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: Psychiatry
[{'content': 'The following symptoms are common in anorexia nervosa, except: \nSelect and explain. \nA. Weight loss, B. Dehydration, C. Mood changes, D. Menorrhagia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Menorrhagia', 'role': 'assistant'}]