system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Predisposing factors for Alzheimer's disease include all EXCEPT
assistant
The correct answer is  (C) Smoking # Risk factors are: Old age, positive family history, head injury, Down's syndrome, low education level, female sex, etc