This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Pharmacology, Subject name: Pharmacology
Pharmacodynamics deals with: 
Select and explain. 
A. Mode of excretion of drug, B. Mechanism of action, C. Transport of drug, D. Latency of onset
B: Mechanism of action
Answer: B: Mechanism of action 
Explanation: Ans. B. Mechanism of actionPharmacodynamics is effect of drug on the body and Pharmacokinetics is what body does to the drug. Pharmacodynamics describes the various mechanism of the drugs and Pharmacokinetics include absorption, distribution, metabolism and excretion. Answer is B