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': 'A patient is brought with 6 month history of odd behaviour. There is a history of a family member having disappeared some years back. He seems to be talking to himself and sometimes muttering to himself loudly. The likely diagnosis is - \nSelect and explain. \nA. Schizophrenia, B. Conversion disorder, C. Major depression, D. Delusion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: This patient is having:-\n\n\nDisorganized behavior & thinking (talking to himself)\nDisorganized speech (muttering to himself loudly)\nSymptoms for 6 months\n\n\nDiagnostic criteria for schizophrenia:- 2 or more of the following features (each present for more than 1 month), causing social or occupational dysfunction for more than 6 months:-\n\n1)\xa0\xa0\xa0 Hallucinations; 2) Delusions; 3) Disorganized speech; 4) Disorganized or catatonic behavior; and 5) Negative symptoms.', 'role': 'assistant'}]