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: Pharmacology
[{'content': 'From which of the following routes, absorption of local anaesthetic is maximum ? \nSelect and explain. \nA. Intercostal, B. Epidural, C. Brachial, D. Caudal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]