This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clinical Presentation and Physiology, Subject name: Surgery
All are risk factors for Ca breast EXCEPT - 
Select and explain. 
A. BRCA 2 gene positive, B. Personal h/o breast Ca, C. Fibroadenosis, D. Multiparity
D: Multiparity
Answer: D: Multiparity 
Explanation: Ans. is 'd' i.e., Multiparity o Has been explained in previous sessions