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
From which of the following routes, absorption of local anaesthetic is maximum? 
Select and explain. 
A. Intercostal, B. Epidural, C. Brachial, D. Caudal
A: Intercostal
Answer: A: Intercostal 
Explanation: Intercostal nerve block (abbreted ICNB) is a nerve block which temporarily or permanently interrupts the flow of signals along an intercostal nerve, usually performed to relieve pain.