Get Started
1399

Q: The first effective vaccine against polio was prepared by ?

  • 1
    Robert Edwards
  • 2
    James Simpson
  • 3
    H Gibbon
  • 4
    Jonas E Salk
  • Show Answer
  • Workspace

Answer : 4. "Jonas E Salk"
Explanation :

Answer: D) Jonas E Salk Explanation:

Previous Next
IIT JEE Inventions

The Most Comprehensive Exam Preparation Platform

Get the Examsbook Prep App Today