This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Symptoms & Signs , Subject name: Psychiatry
[{'content': 'A 32 year old female starts developing suspicion on her husband of having an affair with his secretory for 2 weeks. Diagnosis is? \nSelect and explain. \nA. Illusion, B. Delusion, C. Hallucination, D. Delirium', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e. Delusion * Above is an example of delusion of infidelity (morbid jealousy, Othello syndrome) i.e. False belief that one's lover has been unfaithful* A delusion is false, firm (unshakeable) belief that is not accepted by other members of patient's culture and society.", 'role': 'assistant'}]