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
True about manic-depressive psychosis is: 
Select and explain. 
A. Personality deterioration is common, B. Patient keeps on suffering from mania or depression, C. Unipolar depression is uncommon, D. Patient often remits completely in between attack
D: Patient often remits completely in between attack
Answer: D: Patient often remits completely in between attack 
Explanation: Patient often remits completely in between attack