The correct order of N-compounds in its decreasing order of oxidation states is
HNO3,NO,N2,NH4Cl
HNO3,NO,NH4Cl,N2
HNO3,NH4Cl,NO,N2
NH4Cl,N2,NO,HNO3
HN+5O3,N+2O,N02,N-3H4Cl