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 used in the prophylactic treatment of - 
Select and explain. 
A. Schizophrenia, B. MDP, C. Acute depression, D. Conversion reaction
B: MDP
Answer: B: MDP 
Explanation: None