Excretion rates of drugs vary greatly depending
a. the type of drug and length of time since it was ingested
b. the type of drug involved and medical condition of the person
c. how much of the drug was taken
d. the age and weight of the person

Answer – B. (The type of drug involved and medical condition of the person)

The rates at which drugs are excreted from the human body vary greatly depending upon the type of drug involved (hydrophilic or lipophilic) and medical condition of the person (e.g. Renal function). 

The answer is d because , safety almost always works, to prevent stds and pregnancy