This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Study dealing with the effect of drugs on the body is known as: 
Select and explain. 
A. Pharmacokinetics., B. Pharmacodynamics., C. Drug kinetics., D. None.
B: Pharmacodynamics.
Answer: B: Pharmacodynamics. 
Explanation: None