This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'With chronic use in seizure state, the adverse effects of this drug include coarsening of facial features, hirsutism gingival hyperplasia and osteomalacia: \nSelect and explain. \nA. Ethosuccimide, B. Carbomazepine, C. Gabapentin, D. Phenytoin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Gum hyperophy: Commonest ( (b) Hirsutism, coarsening of facial features (troublesome in young girls), acne. REF:KD TRIPATHI 8TH ED.', 'role': 'assistant'}]