Why was penicillin considered a breakthrough in World War II?

It treated wounded soldiers' bacterial infections

The correct answer is Option (2)-It treated wounded soldiers' bacterial infections

Antibiotics produced by microbes are regarded as one of the most significant discoveries of thetwentieth century and have greatly contributed towards the welfare of the human society. Antibiotics are chemical substances, which are produced by some microbes and can kill or retard the growth of other (disease-causing) microbes. Penicillin was the first antibiotic produced by Penicillium notatum.

Penicillin was discovered by Alexander Fleming in 1928. Fleming observed that a certain mold, Penicillium notatum, produced a substance that inhibited the growth of bacteria. This substance, later identified as penicillin, was found to be effective in treating bacterial infections. This antibiotic was extensively used to treat American soldiers wounded in World War II. Fleming, Chain and Florey were awarded the Nobel Prize in 1945, for this discovery.