A) $ H _2,Ne,O _2,N _2 $
B) $ H _2,Ne,N _2,O _2 $
C) $ N _2,O _2,Ne,H _2 $
D) $ O _2,N _2,H _2,Ne $
ਸਹੀ ਜਵਾਬ: B
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BETA
