This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'All are vasodilator except \nSelect and explain. \nA. Procaine, B. Lidocaine, C. Cocaine, D. Chloroprocaine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]