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: Pathology
The MOST impoant risk factor for pancreatic cancer among the following is: 
Select and explain. 
A. Cigarette smoking, B. Chronic pancreatitis, C. Diabetes, D. Alcohol
A: Cigarette smoking
Answer: A: Cigarette smoking 
Explanation: All are risk factors of pancreatic malignancy except alcohol. Cigarette smoking is the most common environmental risk factor for pancreatic malignancy. Other risk factors are chronic pancreatitis and diabetes. ALSO NOTE: Alcohol does not appear to be a risk factor. Ref: Harrison, Edition -18, Page-787