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': 'Li is best used in: \nSelect and explain. \nA. MDP - Bipolar, B. MDP - Unipolar, C. MDP - rapid cycles, D. Depression', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. MDP-Bipolar', 'role': 'assistant'}]