NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 58

Polio vaccine was discovered by A. Issac Newton B. Marie Curie C. Jonas Salk D. Albert Einstein

  1. C

  2. D

  3. A

  4. B

Show answer & explanation

Answer: (A) C

Explanation

Jonas Salk developed the first effective (inactivated) polio vaccine, announced in 1955; Albert Sabin later developed the oral polio vaccine.