A) \[{{O}_{2}}+He\]
B) \[{{O}_{2}}+Ne\]
C) \[{{O}_{2}}+{{H}_{2}}\]
D) \[{{O}_{2}}+Ar\]
Correct Answer: A
Solution :
Mixture of \[{{O}_{2}}\] and He is given for artificial respiration to asthama patients.
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