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
What is affected in bipolar disorder 
Select and explain. 
A. Emotions, B. Perception, C. Personality, D. Thought
A: Emotions
Answer: A: Emotions 
Explanation: Bipolar 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, NirajAhujaa, 7th edition, pg no.73)