This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth of the Fetus During Pregnancy, Subject name: Gynaecology & Obstetrics
Fetus most radiosensitive at? 
Select and explain. 
A. 8-15 weeks, B. 10-15 weeks, C. 15-20weeks, D. >20 week
A: 8-15 weeks
Answer: A: 8-15 weeks 
Explanation: Ans. (a) 8-15 weeksRef.: Radiation Injury Prevention and Mitigation in Human by Kedar N. Prasad p-62