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
Delusion is not present in 
Select and explain. 
A. Delirium, B. Mania, C. Depression, D. Compulsive disorder
D: Compulsive disorder
Answer: D: Compulsive disorder 
Explanation: D i.e. Compulsive disorder