1.

{:("List-I","List-2"),("(A) Major constituent",(I)O_(2)" and water vapour"),("(B) Minor constituent",(II)"Ar and "CO_(2)),((B)"Minor constituent",(III) N_(2)),((C)"Trace constituent",(IV)"He, "N_(2)O "and"O_(3)):} The correct match reagarding air

Answer»

`{:(A,B,C),(III,II,IV):}`
`{:(A,B,C),(I,III,IV):}`
`{:(A,B,C),(II,III,IV):}`
`{:(A,B,C),(IV,III,V):}`

ANSWER :A


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