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: Surgery
[{'content': 'Other than lignocaine without vasoconstriction, which LA is indicated in Hyperthyroid patient \nSelect and explain. \nA. 3% Mepivacaine, B. 3% Bupivacaine, C. 3% Ropivacaine, D. 3% procaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]