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': 'Long acting local anesthetic is – a) Procaineb) Lignocainec) Bupivacained) Etidocaine \nSelect and explain. \nA. ab, B. bc, C. cd, D. ac', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Bupivacaine and Etidocaine are long acting.\nLignocaine is intermediate acting.\nProcaine is short acting.', 'role': 'assistant'}]