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
Epidural anaesthesia decrease risk of – a) Headacheb) Hypotensionc) Meningitisd) Arachnoiditis 
Select and explain. 
A. abc, B. ad, C. bc, D. acd
D: acd
Answer: D: acd 
Explanation: As dura is not punctured in epidural anesthesia, chances of postdural puncture headache, meningitis and arachnoiditis are less.