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': 'Best and most effective drug to control convulsions in toxicity cases is: \nSelect and explain. \nA. Phenobarbitone, B. Phenytoin, C. Diazepam, D. Carbemezipine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]