In 1928 , a scientist an antibiotic which was found to be very effective. The name of the scientist and the antibiotic respectively are:

In 1928 , a scientist discovered an antibiotic which was found to be very effective. The name of the scientist and the antibiotic respectively are:

Name any two antibiotics.

Give the name of the first antibiotic.

Name two antibiotics.

Name two antibiotics.

Name any four antibiotics