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': 'In which phase of clinical trials, post-marketing surveillance of a drug is carried out \nSelect and explain. \nA. Phase I, B. Phase II, C. Phase III, D. Phase IV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clinical trials divided into 4 phases Phase I: Human pharmacology and safety Phase II: Therapeutic exploration and dose ranging Phase III: Therapeutic confirmation/comparison Phase IV* Postmarketing surveillance/studies-during this phase or after the release of the drug into the market, ADRs are monitored through pharmacovigilance centers. Ref ;KD Tripathi pharmacology 7 th edition (page no; 80)', 'role': 'assistant'}]