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
Othello syndrome is: 
Select and explain. 
A. Delusions of reference, B. Delusions of grandeur, C. Delusions of doubles, D. Delusion of infedility
D: Delusion of infedility
Answer: D: Delusion of infedility 
Explanation: Delusion of infedility