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
The period of normalcy is seen between two psychosis. The diagnosis is - 
Select and explain. 
A. Schizophrenia, B. Manic depressive psychosis (MDP), C. Alcoholism, D. Depression
B: Manic depressive psychosis (MDP)
Answer: B: Manic depressive psychosis (MDP) 
Explanation: There is a period of euthymia (normal mood) between the episodes of mania and depression.