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: Anatomy
[{'content': 'Most common valvular lesion in carcinoid syndrome of the hea is \nSelect and explain. \nA. AR, B. AS, C. TR, D. MS', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]