Question

what is the name given to a chemical substance that is used to treat disease?
a compound
b antibiotic
c drug
d stimulant

Explanation:

A drug is a chemical substance used to treat, diagnose, prevent, or relieve symptoms of a disease or abnormal condition. An antibiotic is a type of drug used specifically against bacterial infections. A compound is a general chemical - substance formed from two or more elements. A stimulant is a type of drug that increases activity in the body or brain but is just one category of drugs.

Answer:

C. drug