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: Unknown
[{'content': 'VMA is elevated in which of the following condition: \nSelect and explain. \nA. Pheochromocytoma, B. Conn’s syndrome, C. Carcinoid syndrome, D. Tuberous sclerosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref. API Textbook of Medicine. Pg. 114\n\xa0\nVMA is the end product of catabolism of catecholamines.\n\nIn pheochromocytoma and neuroblastoma there is excessive synthesis of catecholamines which causes enhanced synthesis of VMA and its excretion in the urine.\nVMA is the urinary product of both epinephrine and norepinephrine.', 'role': 'assistant'}]