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
[{'content': 'Granulocytopenia, gingival hyperplasia and facial hir–sutism are all possible side effects of one of the following anticonvulsant drugs ? \nSelect and explain. \nA. Phenytoin, B. Valproate, C. Carbamazepine, D. Phenobarbitone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]