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': 'Which of the following is false about Bulimia nervosa ? \nSelect and explain. \nA. More common is males, B. Seen in 20 - 40 year age group, C. Serotonin is implicated in pathophysiology, D. Characterized by binge eating followed by compensatory behaviors.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bulimia nervosa is more common in females.', 'role': 'assistant'}]