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': "Dementia is seen in all except : \nSelect and explain. \nA. Schizophrenia, B. Head injury, C. Huntington's chorea, D. Frontal lobe tumour", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Schizophrenia', 'role': 'assistant'}]