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': 'Maximum safe dose of lignocaine for spinal anesthesia is \nSelect and explain. \nA. 5-15 mg, B. 25-100 mg, C. 100-200 mg, D. 150-300 mg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 25-100 mg', 'role': 'assistant'}]