This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': '25-year-old woman is being treated for a laceration to the forearm. Local anesthesia is used prior to suturing. An allergic reaction is most likely to occur with wof local anesthetics \nSelect and explain. \nA. Lidocaine, B. Procaine, C. Mepivacaine, D. Bupivacaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The clinically useful LAs are weak bases with amphiphilic propey. A hydrophilic secondaryor teiary amine on one side and a lipophilic aromatic residue on the other are joined by an alkyl chain through an ester or amide linkage. Ref :- kd tripathi; pg num:-360,361', 'role': 'assistant'}]