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: Social & Preventive Medicine
[{'content': 'All are modifiable risk factors except \nSelect and explain. \nA. Weight, B. Cigarette smoking, C. Personality, D. Diabetes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]