This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gestational Trophoblastic Disease, Subject name: Gynaecology & Obstetrics
A female with H/O trophoblastic has ____% chances of developing trophoblastic disease in next pregnancy: 
Select and explain. 
A. 2%, B. 5%, C. 8-12%, D. 15-20%
A: 2%
Answer: A: 2% 
Explanation: Ans. is a, i.e. 2%Ref. Williams 24/e, p 404, Dutta Obs. 8/e, p 226Friends: Remember both the values-specifically-risk of recurrence of trophoblastic disease in future pregnancies is 2% range is 1-4%