This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'The following statement is true regarding chrono-pharmacology(REPEAT) \nSelect and explain. \nA. Study of time related effects of drugs, B. Study of dose related effects of drugs, C. Study of adverse effects of drugs, D. Study of naturally obtained drugs', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Chrono-pharmacology is the science dealing with effects of drugs in relation to biological clock.', 'role': 'assistant'}]