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
[{'content': 'The aim of post-marketing study is: \nSelect and explain. \nA. Efficacy of the drug, B. Dosage of the drug, C. Deals with alteration of the drug includes absoion, distribution, binding/ storage, D. rare adverse effects identification', 'role': 'user'}, {'content': 'Answer: D \nExplanation: post-marketing trial means phase IV trial Phase IV clinical trials are conducted to identify and evaluate the long-term effects of new drugs and treatments over a lengthy period for a greater number of patients Phase IV research takes place after the FDA approves the marketing of a new drug Pg.no.80 KD Tripathi Seventh edition', 'role': 'assistant'}]