This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Pathology
Smoking is not a risk factor for - 
Select and explain. 
A. Lung carcinoma, B. Osteoporosis, C. Nonunion of bones, D. Alzhiemers disease
D: Alzhiemers disease
Answer: D: Alzhiemers disease 
Explanation: Ans. is 'd' i.e., Alzhiemers disease o Smoking is not a risk factor for the development of alzhiemers disease