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
Lithium is treatment of choice for 
Select and explain. 
A. Unipolar MDP prophylaxis, B. Bipolar MDP prophylaxis, C. Schizophrenia, D. Acute mania
B: Bipolar MDP prophylaxis
Answer: B: Bipolar MDP prophylaxis 
Explanation: B i.e. Bipolar MDP prophylaxis