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: Unknown
A postspinal headache is due to - 
Select and explain. 
A. Injury to spinal cord, B. CSF leak from dura, C. Meningitis, D. Raised intracranial pressure
B: CSF leak from dura
Answer: B: CSF leak from dura 
Explanation: Ans: B