Which of the following scientists is credited with the development of the first successful polio vaccine? [#1300]

Jonas Salk developed the inactivated poliovirus vaccine (IPV) in 1955, which was the first effective vaccine against polio. Salk's vaccine led to a significant reduction in polio cases and paved the way for global efforts to eradicate the disease.

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Jonas Salk developed the inactivated poliovirus vaccine (IPV) in 1955, which was the first effective vaccine against polio. Salk's vaccine led to a significant reduction in polio cases and paved the way for global efforts to eradicate the disease.

The Bhimbetka rock shelters are an archaeological site in central India that spans the Paleolithic and Mesolithic periods, as well as the historic period. It exhibits the earliest traces of human life in India and evidence of the Stone Age starting at the site in Acheulian times. It is located in the Raisen District in the Indian state of Madhya Pradesh, about 45 kilometres (28 mi) south-east of Bhopal.

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The Bhimbetka rock shelters are an archaeological site in central India that spans the Paleolithic and Mesolithic periods, as well as the historic period. It exhibits the earliest traces of human life in India and evidence of the Stone Age starting at the site in Acheulian times. It is located in the Raisen District in the Indian state of Madhya Pradesh, about 45 kilometres (28 mi) south-east of Bhopal.

Isaac Newton is widely credited with the discovery of gravity and formulated the laws of motion that bear his name.

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Isaac Newton is widely credited with the discovery of gravity and formulated the laws of motion that bear his name.

Ganymede, a moon of Jupiter, is the largest natural satellite in the solar system, with a diameter of approximately 5,262 kilometers (3,270 miles). It is even larger than the planet Mercury

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Ganymede, a moon of Jupiter, is the largest natural satellite in the solar system, with a diameter of approximately 5,262 kilometers (3,270 miles). It is even larger than the planet Mercury

An equilateral triangle is a triangle with three equal sides and angles, a regular polygon with three sides.

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An equilateral triangle is a triangle with three equal sides and angles, a regular polygon with three sides.

Transpiration is the process by which plants transport water and minerals from the roots to the leaves, where it is used for photosynthesis and other metabolic processes. Excess water is released into the air as water vapor through tiny openings called stomata.

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Transpiration is the process by which plants transport water and minerals from the roots to the leaves, where it is used for photosynthesis and other metabolic processes. Excess water is released into the air as water vapor through tiny openings called stomata.

Knockdown and Knockout are the terminology of boxing. A knockdown happens when a boxer tumbles to the ground of the boxing ring as a result of a blow from the rival. A knockout is an automatic win for the opponent, and refers to a player being knocked down for more than 10 seconds. The referee will start counting down from 10 once a player has been knocked down, and the player has to regain his position in order to continue the round.

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Knockdown and Knockout are the terminology of boxing. A knockdown happens when a boxer tumbles to the ground of the boxing ring as a result of a blow from the rival. A knockout is an automatic win for the opponent, and refers to a player being knocked down for more than 10 seconds. The referee will start counting down from 10 once a player has been knocked down, and the player has to regain his position in order to continue the round.

The perimeter is the distance around a shape, like the distance around a rectangle, triangle, or circle.

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The perimeter is the distance around a shape, like the distance around a rectangle, triangle, or circle.

The ISI mark is a certification mark for industrial and consumer products in India that indicates that a product meets the standards set by the Bureau of Indian Standards (BIS). The BIS is the national standards body of India and the ISI mark has been used since 1955.

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The ISI mark is a certification mark for industrial and consumer products in India that indicates that a product meets the standards set by the Bureau of Indian Standards (BIS). The BIS is the national standards body of India and the ISI mark has been used since 1955.

Henry Cotton was a British administrator who served as the Chief Commissioner of Assam from 1896 to 1902. He is credited with introducing the Assam Railway and the Assam Tea Company, and is often referred to as the "Maker of Modern Assam" for his contributions to the state's development.

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Henry Cotton was a British administrator who served as the Chief Commissioner of Assam from 1896 to 1902. He is credited with introducing the Assam Railway and the Assam Tea Company, and is often referred to as the "Maker of Modern Assam" for his contributions to the state's development.

Rashtriya Ekta Diwas, or National Unity Day, is observed on 31st October every year in India. It was introduced by the Government of India in 2014. The day is celebrated to mark the birth anniversary of Vallabhbhai Patel who had a major role in the political integration of India.

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Rashtriya Ekta Diwas, or National Unity Day, is observed on 31st October every year in India. It was introduced by the Government of India in 2014. The day is celebrated to mark the birth anniversary of Vallabhbhai Patel who had a major role in the political integration of India.