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': 'In spinal anaesthesia, the drug is deposited between – \nSelect and explain. \nA. Dura and arachnoid, B. Pia and arachnoid, C. Dura and vertebra, D. Into the cord substance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In spinal anesthesia LA is injected into subarachnoid space (space between pia matter and arachnoid matter).', 'role': 'assistant'}]