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': 'False about delusional disorder \nSelect and explain. \nA. Delusion is a disorder of thought content, B. Patient has a false belief, C. Delusion of persecution is the most common, D. Hallucination is present', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Delusional disorders are characterized by development of single or set of delusions and absence of hallucination, illusion and disorganised behaviour.', 'role': 'assistant'}]