This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Weight gain Is seen In all except- \nSelect and explain. \nA. Cushings syndrome, B. Hypothyroidism, C. Pheochromocytoma, D. Insulinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In pheochromocytoma, the child has a good appetite but because of the hypermetabolic state does not gain weight, and severe cachexia may develop. Page 1942, Nelson textbook of pediatrics 19th edition', 'role': 'assistant'}]