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': 'In spinal anaesthesia the drug is deposited between? \nSelect and explain. \nA. Dura and arachnoid, B. Pia and arachnoid, C. Dura and veebra, D. Into the cord substance', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pia and arachnoid matter o In spinal anaesthesia LA is injected into subarachnoid space (space between pia matter and arachnoid matter). o Structure pierced during SA (from outside in) - Skin - Subcutaneous tissue --> Supraspinous & intraspinous ligament --> Ligamentum falvum --> Duramater - Arachnoidmater.", 'role': 'assistant'}]