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': 'Intense depression & misery, without any cause is seen in \nSelect and explain. \nA. Melancholic depression, B. Reactive depression, C. Schizophrenia, D. Mania', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Melancholic depression is characterized by state of intense depression and feeling of misery without any cause.', 'role': 'assistant'}]