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 presence of delusion, hallucination and disturbed cognitive functions indicate: \nSelect and explain. \nA. Paranoid Psychosis, B. OCD, C. Dissociative disorder, D. Organic Brain Syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: C i.e. Organic brain syndrome', 'role': 'assistant'}]