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': 'Depressive delusions that the world and everything related to it cease to exist is called:COMEDK 07; NIMHANS 11 \nSelect and explain. \nA. Persecutory delusion, B. Delusion of infidelity, C. Nihilistic delusion, D. Delusion of reference', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Nihilistic delusion', 'role': 'assistant'}]