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': 'Dose of lignocaine for spinal anesthesia is? \nSelect and explain. \nA. 0.50%, B. 2.50%, C. 4%, D. 5%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 5% REF: Morgan\'s 4th e p. 270, KDT 6th edition page 357 Concentration of lignocaine can be remembered as "INETS" IV regional anesthesia 0.5% Nerve block 1% Epidural / jelly 2% Topical 4% Spinal 5%', 'role': 'assistant'}]