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 the Hea is: \nSelect and explain. \nA. Aoic Stenosis, B. Mitral Stenosis, C. Tricuspid regurgitation, D. Aoic regurgitation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Tricuspid Regurgitation) Carcinoid syndrome most frequently involves the ventricular aspect of the tricuspid valve. The predominant lesion due to involvement of the tricuspid valve is Tricuspid regurgitation.', 'role': 'assistant'}]