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': 'All of the following are thought disorders, EXCEPT: \nSelect and explain. \nA. Paranoia, B. OCD, C. Delusion, D. Visual Hallucination', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Thought disorders can be of 2 types: a) Disorders of thought form or stream e.g. Thought block, formal thought disorder in Schizophrenia, disorganised thinking, derailment in thinking etc b) Disorders of thought content e.g. Delusions, obsessions and compulsions etcHallucinations are not thought disorders. They are perceptual abnormalities. Hallucinations can however lead to secondary delusions.', 'role': 'assistant'}]