✅ Correct Answer: Alexander Fleming
Source: This question is taken from the Combined Competitive Examination (PMS) 2015 Paper General
✅ Correct Answer: Edward Jenner
Source: This question is taken from the Assistant Sub Inspector (ASI) Anti-Corruption Punjab Police
✅ Correct Answer: William Harvey
Source: This question is taken from the Junior Clerk (BS-11) Board of Revenue PPSC Past Paper