This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Pharmacology
[{'content': 'Pharmacodynamics deals with:- \nSelect and explain. \nA. Mode of excretion of a drug, B. Mechanism of action of a drug, C. Transpo of drug across the biological membranes, D. Latency of onset', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 2 main branches in pharmacology Pharmacodynamics Studies effect of drug on body, i.e. Action of drug. Mechanism of action Pharmacokinetics Studies effect of body on drug, i.e. Absorption Distribution Metabolism Excretion Option A , C , D is studied in pharmacokinetics of drugs.', 'role': 'assistant'}]