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
Pungent volatile anaesthetic agents are – a) Halothaneb) Isofluranec) Sevofluraned) Desfluranee) N2O 
Select and explain. 
A. c, B. d, C. bd, D. ac
C: bd
Answer: C: bd 
Explanation: Pungent volatile anaesthetics :- Desflurane, isoflurane, enflurane, ether.
"Desflurane is the most pungent of the volatile anaesthetic".
Non pungent volatile anaesthetics N2O, Halothane, Sevoflurane.