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
One of the potential microsomal enzymes inhibitor drug is: 
Select and explain. 
A. Phenobarbitone, B. Griseofulvin, C. Sodium valproate, D. Phenytoin
C: Sodium valproate
Answer: C: Sodium valproate 
Explanation: None