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: Medicine
[{'content': 'Most common valvular lesion in carcinoid syndrome of hea is: \nSelect and explain. \nA. Aoic stenosis, B. Tricuspid regurgitation, C. Mitral Stenosis, D. Aoic Regurgitation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Tricuspid Regurgitation) Carcinoid syndrome most frequently involves the ventricular aspect of the tricuspid valve and leads to Tricuspid Regurgitation', 'role': 'assistant'}]