This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood disorders, Subject name: Psychiatry
The period of normalcy is seen between two psychotic episodes. 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: Bipolar mood disorder earlier known as manic-depressive psychosis is characterised by recurrent episodes of mania and depression in the same patient at different times. These episodes can occur in any sequence. (Ref: a sho textbook of psychiatry, Niraj Ahuja,7th edition, pg no73)