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: Surgery
Statistically impoant risk factors identified for breast cancer- 
Select and explain. 
A. Early age at marriage, B. Females of non vegetarian diet, C. Those who have not breast fed their children, D. Smoking
C: Those who have not breast fed their children
Answer: C: Those who have not breast fed their children 
Explanation: Ans. is 'c' i.e. Those who have not breast fed their children