This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Social & Preventive Medicine
Which one of the following is not associated with risk of cancer 
Select and explain. 
A. Smoking, B. Alcohol, C. Chewing betel, D. Excess fibre
D: Excess fibre
Answer: D: Excess fibre 
Explanation: (D) Excess fibre