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': 'All are true about atypical depression except \nSelect and explain. \nA. Increased sleep and appetite is present, B. Weight gain can be seen, C. Fatigue & heaviness of the lower limbs is present, D. Mood reactivity to positive stimulus is absent', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mood reactivity of positive stimulus is present, that is patient feels better if some positive events occur in life.\nMood reactivity is absent in Melancholic depression.', 'role': 'assistant'}]