21. Who discovered the vaccine for chickenpox?
a) Edward Jenner
b) Louis Pasteur
c) Maurice Hilleman
d) Jonas Salk
Answer: c) Maurice Hilleman
22. Which of the following drugs is used to treat angina?
a) Nitroglycerin
b) Methotrexate
c) Fluoxetine
d) Alprazolam
Answer: a) Nitroglycerin
23. Who discovered the antibiotic erythromycin?
a) Alexander Fleming
b) Louis Pasteur
c) Gerhard Domagk
d) Abelardo Aguilar
Answer: d) Abelardo Aguilar
24. Which of the following drugs is used to treat seizures?
a) Risperidone
b) Fluoxetine
c) Clonazepam
d) Gabapentin
Answer: c) Clonazepam
25. Who discovered the antiviral drug acyclovir?
a) Gerhard Domagk
b) Selman Waksman
c) Howard Florey
d) Gertrude B. Elion
Answer: d) Gertrude B. Elion
