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: ENT
[{'content': 'Endolymphatic duct drains into - \nSelect and explain. \nA. subdural space, B. Extradural space, C. Subarachnoid space, D. Sacculus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]