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
Bone marrow depression is seen with. 
Select and explain. 
A. Halothene, B. N20, C. Ether, D. Isoflurane
B: N20
Answer: B: N20 
Explanation: B i.e. N2O