This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Phase IV of Clinical trials collect information specifically about? \nSelect and explain. \nA. Drug efficacy, B. Drug potency, C. Drug toxicity, D. Other possible uses of the drug', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Drug toxicity", 'role': 'assistant'}]