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
Regarding the epidural space, all are true except 
Select and explain. 
A. Is a open space, B. Lies outside of the dura mater, C. Ends at the sacrococcygeal  membrane, D. Continues through foramen magnum into the skull
D: Continues through foramen magnum into the skull
Answer: D: Continues through foramen magnum into the skull 
Explanation: Epidural space is closed superiorly at foramen magnum.