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
Which of the following is/are included in bipolar disease -a) Hypomaniab) Cyclothymiac) Paranoid disorderd) Hyperthymiae) Kleptomania 
Select and explain. 
A. ac, B. ab, C. ad, D. bc
B: ab
Answer: B: ab 
Explanation: None