The correct option is C Diphenhydramine
Diphenhydramine is an antihistamine, reduces the effects of natural chemical histamine in the body. Diphenhydramine is used to treat sneezing, runny nose, watery eyes, hives, skin rash, itching, and other cold or allergy symptoms. It is also used to treat motion sickness, to induce sleep and to treat certain symptoms of Parkinson's disease.