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: Anatomy
Where does the main part of vertebral venous plexus lie 
Select and explain. 
A. Subdural space, B. Epidural space, C. Subarachnoid space, D. Outside the vertebra
B: Epidural space
Answer: B: Epidural space 
Explanation: Vertebral venous plexus lies in the epidural space.