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': 'The primary disturbance in schizophrenia is \nSelect and explain. \nA. Hallucination, B. Illusion, C. Psychomotor Retardation, D. Formal Thought Disorder', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Formal thought disorder', 'role': 'assistant'}]