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
[{'content': 'The period of normalcy is seen between two psychosis. The diagnosis is: \nSelect and explain. \nA. Schizophrenia, B. Manic depressive psychosis, C. Alcoholism, D. Depression', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Manic depressive psychosis was the older name for bipolar disorder. In bipolar disorder, in between the episodes, patient is usually normal. Bipolar disorder: Episodes of - both mania (continuing or at least 1 week) and depression (bipolar I disorder) -both hypomania (continuing or at least 4 days) and depression (bipolar II disorder)', 'role': 'assistant'}]