(A) Alexander Fleming
(B) Graham Bell
(C) Lister
(D) None of these
🧠 Explanation:
- Penicillin is widely regarded as the first true antibiotic used to treat bacterial infections.
- Its discovery marked a revolutionary step in modern medicine and infection control.
- The antibiotic was discovered accidentally from a mold known as *Penicillium notatum*.
- This groundbreaking discovery was made by Alexander Fleming in 1928.