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
Sulfonylurea is shifted to insulin in pregnant lady because : 
Select and explain. 
A. Sulphonylurea causes PIH, B. Increases demands during pregnancy not compensated by sulfonyl urea alone, C. Insulin does not cross placenta, D. Sulfonylurea depletes insulin from fetus-beta cell of pancreas
C: Insulin does not cross placenta
Answer: C: Insulin does not cross placenta 
Explanation: Insulin does not cross placenta