This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Pharmacology
Least teratogenic antiepileptic drug in pregnancy is; 
Select and explain. 
A. Valproate, B. Phenytoin, C. Carbamazepine, D. Levetiracetam
D: Levetiracetam
Answer: D: Levetiracetam 
Explanation: Anti-epileptic with highest risk of teratogenicity - Valproate - causes neural tube defects Anti-epileptic with lowest risk of teratogenicity- Lamotrigine >Levetiracetam