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
Which anticonvulsant is safe during pregnancy ? 
Select and explain. 
A. Valproic acid, B. Carbamazepine, C. Ethosuximide, D. Phenytoin
B: Carbamazepine
Answer: B: Carbamazepine 
Explanation: Carbamazepine