This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional anaesthesia, Subject name: Anaesthesia
[{'content': 'The topical use of following local anesthetic is not recommended? \nSelect and explain. \nA. Ligocaine, B. Bupivacaine, C. Cocaine, D. Dibucaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bupivacine cannot be used as surface anesthetic agent Bupivacine is also contraindicated in regional IV anesthesia or Bier&;s block due to fear of cardiac arrhythmia It can be used in peripheral nerve block, epidural and intrathecal routes', 'role': 'assistant'}]