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': 'EMLA constituent is – \nSelect and explain. \nA. Lidocaine + Cocaine, B. Lidocaine + Prilocaine, C. Lidocaine + Bupivacaine, D. Bupivacaine + Prilocaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Eutectic mixture of local anaesthetics (EMLA) is a mixture of 2.5% lidocaine and 2.5 prilocaine.', 'role': 'assistant'}]