HomePPSC Past PapersWho invented the polio vaccine? 30. Who invented the polio vaccine?By Admin / September 20, 2025 A. Jonas Salk B. Burk Holder C. Robert Koch D. Albert Sabin ✅ The correct answer is option Jonas Salk.
38. Which article of the 1973 constitution of Islamic Republic of Pakistan prohibits all forms slavery, Forced labour and child labour Leave a Comment / PastPaper 02, PPSC Past Papers / By Admin