Which of the following is the correct order of increasing field strength of ligands to form coordination compounds ?

In general, ligands can be arranged in a series in the order of increasing fi eld strength, as given below, according to spectrochemical series:
${\mathrm{I}}^{-}<{\mathrm{Br}}^{-}<{\mathrm{SCN}}^{-}<{\mathrm{Cl}}^{-}<{\mathrm{S}}^{2-}<{\mathrm{F}}^{-}<\mathrm{OH}<{\mathrm{C}}_2{\mathrm{O}}_4^{2-}<{\mathrm{H}}_2\mathrm{O}<{\mathrm{NC}}^{-}<{\text{EDTA}}^{4-}<{\mathrm{NH}}_3<\text{en}<{\mathrm{CN}}^{-}<\mathrm{CO}.$

The increasing fi eld strength of ligands to form coordination compounds is ${\mathrm{SCN}}^{-}<{\mathrm{F}}^{-}<{\mathrm{C}}_2{{\mathrm{O}}_4}^{2-}<{\mathrm{CN}}^{-}.$