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: Pharmacology
Not a teratogen is: 
Select and explain. 
A. Alcohol, B. Warfarin, C. Metocloperamide, D. Phenytoin
C: Metocloperamide
Answer: C: Metocloperamide 
Explanation: Metocloperamide