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: Anaesthesia
[{'content': 'Which of the following is not primarily used to anesthetize mucosa ? \nSelect and explain. \nA. Benzocaine, B. Lidocaine, C. Bupivacain, D. Tetracaine', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Bupivacaine", 'role': 'assistant'}]