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
Maximum permissible radiation dose in pregnancy is : 
Select and explain. 
A. 0.5 rad, B. 1.0 rad, C. 1.5 rad, D. 5.0 rad
D: 5.0 rad
Answer: D: 5.0 rad 
Explanation: 5.0 rad