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
High risk of post dural puncture headache is seen with 
Select and explain. 
A. Spinal needle, B. Epidural needle, C. Both, D. None
B: Epidural needle
Answer: B: Epidural needle 
Explanation: Large epidural needle has highest risk of post dural puncture headache.