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': 'Weight loss may be seen in all of the following except : \nSelect and explain. \nA. Uremia, B. Pheochromacytoma, C. Adrenal insufficiency, D. Insulinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Insulinoma); Insulinoma is characterised by an increase in weight (weight gain) and not by weight loss. Weight gain may result from increased food ingested to combat symptoms of hypoglycemia.', 'role': 'assistant'}]