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': 'Not used topically is: \nSelect and explain. \nA. Lignocaine, B. Bupivicaine, C. Dibucaine, D. Tetracaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bupivicaine', 'role': 'assistant'}]