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': "Following are predispositions to Alzheimer\\'s disease except - \nSelect and explain. \nA. Down's syndrome, B. Head trauma, C. Smoking, D. Low education group", 'role': 'user'}, {'content': "Answer: C \nExplanation: Risk factors for Alzheimer's disease:- Old age, female sex, positive family history, head trauma, low educational status, depression, metabolic (diabetes, hypercholesterolemia, elevated homocysteine), hypertension, CVA (stroke), Heavy metals (mercury, aluminium), genetic factors, down's syndrome.", 'role': 'assistant'}]