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
Most common type of delusion is : 
Select and explain. 
A. Delusion of reference, B. Paranoid delusion, C. Delusion of guilt, D. Delusion of persecution
D: Delusion of persecution
Answer: D: Delusion of persecution 
Explanation: Delusion of persecution : Patient believes that someone is going to harm him, his family or his property.