This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
The performance of a prophylactic salpingo-oophorectomy reduced the risk of BRCA-related gynaecologic cancer by 
Select and explain. 
A. 15%, B. 28%, C. 54%, D. 96%
D: 96%
Answer: D: 96% 
Explanation: The performance of a prophylactic salpingo-oophorectomy reduced the risk of BRCA related gynaecologic cancer by 96%. The risk of developing subsequent breast cancer was reduced by 50% to 80%.