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': 'Delusions are seen in all the following except - \nSelect and explain. \nA. Obsessive compulsive disorder, B. Depression, C. Mania, D. Schizophrenia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]