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.

---

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.

Zero

---

Zero

Rajasthan is the largest producer of asbestos in India. Two states of Rajasthan and Andhra Pradesh produce almost the whole of asbestos of India.

---

Rajasthan is the largest producer of asbestos in India. Two states of Rajasthan and Andhra Pradesh produce almost the whole of asbestos of India.

Saturn's ring system is one of the most extensive and visible in our solar system, composed of seven main rings and numerous smaller ringlets. The rings are made up of ice particles and rock debris.

---

Saturn's ring system is one of the most extensive and visible in our solar system, composed of seven main rings and numerous smaller ringlets. The rings are made up of ice particles and rock debris.

Reflexive pronouns like "himself", "herself", "itself", "themselves" refer back to the subject of the sentence, indicating that the action is being performed on the subject itself.

---

Reflexive pronouns like "himself", "herself", "itself", "themselves" refer back to the subject of the sentence, indicating that the action is being performed on the subject itself.

Indira Point is located on Great Nicobar Island in the Andaman and Nicobar Islands, which are in the eastern Indian Ocean. It's the southernmost point of India, and its coordinates are 6°45'10″N and 93°49'36″E.

---

Indira Point is located on Great Nicobar Island in the Andaman and Nicobar Islands, which are in the eastern Indian Ocean. It's the southernmost point of India, and its coordinates are 6°45'10″N and 93°49'36″E.

When buying gold jewelry in India, you should look for the BIS hallmark logo to certify the purity of the metal. The BIS (Bureau of Indian Standards) is the official agency that certifies and hallmarks gold jewelry in India. The hallmark also includes a 6-digit alphanumeric code called the Hallmark Unique Identification number (HUID) that makes the jewelry traceable.

---

When buying gold jewelry in India, you should look for the BIS hallmark logo to certify the purity of the metal. The BIS (Bureau of Indian Standards) is the official agency that certifies and hallmarks gold jewelry in India. The hallmark also includes a 6-digit alphanumeric code called the Hallmark Unique Identification number (HUID) that makes the jewelry traceable.

The Varman dynasty ruled the ancient kingdom of Kamarupa in the Brahmaputra Valley from the 4th to the 7th century CE. During their reign, they built several temples, monuments, and cities, and developed a distinct culture that blended Indian and Southeast Asian influences.

---

The Varman dynasty ruled the ancient kingdom of Kamarupa in the Brahmaputra Valley from the 4th to the 7th century CE. During their reign, they built several temples, monuments, and cities, and developed a distinct culture that blended Indian and Southeast Asian influences.

An erratic is a rock that has been transported by a glacier and deposited in a new location, often far from its original source. Erratics can provide valuable information about the geological history of an area.

---

An erratic is a rock that has been transported by a glacier and deposited in a new location, often far from its original source. Erratics can provide valuable information about the geological history of an area.

The Nobel Peace Prize ceremony takes place in Oslo, Norway, specifically in the Atrium of the University of Oslo since 2020. Previously, the ceremony was held in Oslo City Hall from 1990–2019, and in the auditorium of the University of Oslo from 1947–1989. The Nobel Peace Prize ceremony takes place in Oslo in Norway, while the other prize ceremonies take place annually in Stockholm, Sweden. It is one of the five Nobel prizes presented in the fields of Literature, Physics, Chemistry, Physiology or Medicine, and Peace.

---

The Nobel Peace Prize ceremony takes place in Oslo, Norway, specifically in the Atrium of the University of Oslo since 2020. Previously, the ceremony was held in Oslo City Hall from 1990–2019, and in the auditorium of the University of Oslo from 1947–1989. The Nobel Peace Prize ceremony takes place in Oslo in Norway, while the other prize ceremonies take place annually in Stockholm, Sweden. It is one of the five Nobel prizes presented in the fields of Literature, Physics, Chemistry, Physiology or Medicine, and Peace.

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.

---

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.