This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Anatomy
[{'content': 'cardiac involvement in carcinoid syndrome is characterized by \nSelect and explain. \nA. Calcification tricuspid valve, B. Intimal Fibrosis of right ventricle, tricuspid and pulmonary valve, C. Involvement of the major Britishers is commonly seen, D. Equal involvement of both the sides of the hea', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Refer robbins 9/e 562 Cardiac lesions are seen in 50% of the patients with carcinoid syndrome These are largely right-sided due to inactivation of serotonin and predicate in in the blood due to passage through the lungs by monoamine oxidase present in pulmonary vascular endothelium', 'role': 'assistant'}]