Asthma patient use a mixture of ?.. for respiration [DCE 2003]

1.	Asthma patient use a mixture of ?.. for respiration [DCE 2003]
A.	\[{{O}_{2}}\] and \[{{N}_{2}}O\]
B.	\[{{O}_{2}}\] and \[He\]
C.	\[{{O}_{2}}\] and \[N{{H}_{3}}\]
D.	\[{{O}_{2}}\] and \[CO\]
Answer» C. \[{{O}_{2}}\] and \[N{{H}_{3}}\]

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Asthma patient use a mixture of ?.. for respiration [DCE 2003]

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