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
[{'content': 'Husband having suspicion that his wife is having affair with another man, diagnosis is ? \nSelect and explain. \nA. Illusion, B. Delusion, C. Hallucination, D. Delirium', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B. DelusionA delusion is false, firm (unshakeable) beliefthat is not accepted by other members of patient's culture and society.Above is an example of delusion of infedility (morbid jealousy, othello syndrome) i.e-. False belief that one's lover has been unfaithful.", 'role': 'assistant'}]