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': 'Caudal Anesthesia is produced by introduction of local Anesthetic solution into \nSelect and explain. \nA. Subarachnoid space, B. Peridural space, C. Lower part of the subarachnoid space, D. Sacral canal through the sacral hiatus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]