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
With chronic use in seizure state, the adverse effects of this drug include coarsening of facial features,hirsutism, gingival hyperplasia and osteomalacia: 
Select and explain. 
A. Carbomazepine, B. Ethosuximide, C. Gabapentin, D. Phenytoin
D: Phenytoin
Answer: D: Phenytoin 
Explanation: None