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
True about phenytoin is 
Select and explain. 
A. First pass metabolism, B. Not teratogenic, C. Drug of choice for absence seizure, D. causes nystagmus and ataxia
D: causes nystagmus and ataxia
Answer: D: causes nystagmus and ataxia 
Explanation: None