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': 'ECT in depressive phase of MDP is useful because it- \nSelect and explain. \nA. Produces recurrence, B. Reduces recurrence, C. Shortens duration, D. Increases drug effects', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ECT shortens the duration of depressive episode. It doesn’t prevent the recurrence unless given as a maintenance treatment.', 'role': 'assistant'}]