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: Gynaecology & Obstetrics
The combined oral contraceptive pills decrease the risk of the following except : 
Select and explain. 
A. Endometrial cancer, B. Ovarian cancer, C. Ectopic pregnancy, D. Breast cancer
D: Breast cancer
Answer: D: Breast cancer 
Explanation: Breast cancer