This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'A patient was on antiepileptics. Hirsutism, coarsening of facial features, gingival hyperophy is noted in the patient. The epileptic could be \nSelect and explain. \nA. Phenytoin, B. Valproic acid, C. Ethosuximide, D. Lamotrigine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Long-term use of phenytoin is associated with untoward cosmetic effects (e.g., hirsutism, coarsening of facial features, gingival hyperophy) and effects on bone metabolism. Due to these side effects, phenytoin is often avoided in young patients who are likely to require the drug for many years.Ref: Harrison 19e 2552', 'role': 'assistant'}]