Correct Answer: Penicillin

Solution : The correct option is - Penicillin

When researching Staphylococcus bacteria that he noticed growing in one of his unclean petri cultures, Alexander Fleming discovered the first antibiotic, penicillin, in 1928. Ernest Chain and Howard Florey, who shared the Nobel Prize for their discovery in 1945, were the ones who eventually realized its full potential as a powerful antibiotic.