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
The following statement is true regarding chrono-pharmacology(REPEAT) 
Select and explain. 
A. 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
A: Study of time related effects of drugs
Answer: A: Study of time related effects of drugs 
Explanation: Chrono-pharmacology is the science dealing with effects of drugs in relation to biological clock.