Smoking is not a risk factor for: (A) Lung carcinoma, (B) Osteoporosis, (C) Nonunion of bones, (D) Alzhiemers disease
Answer is D. Answer- D. Alzhiemers disease"Recent research has shown that smoking is a signifcant risk factor for vascular dementia and Alzheimer's disease, with smokers twice as likely to develop the disease as non-smokers".