Which is the decreasing order of strength of bases : OH^- , NH_2^(-), HC -=C^(-) and CH_3 CH_2^(-) ?

Which is the decreasing order of strength of bases : OH^- , NH_2^(-),

1.	Which is the decreasing order of strength of bases : OH^- , NH_2^(-), HC -=C^(-) and CH_3 CH_2^(-) ?
Answer» `CH_3CH_2^(-) GT NH_2^(-) gt HC-=C^(-) gt OH^(-)` `HC-=C^(-) gt CH_3CH_2^(-) gt NH_2^(-) gt OH^(-)` `OH^(-) gt NH_2^(-) gt HC -=C^(-) gt CH_3CH_2^(-)` `NH_2^(-) gt HC -=C^(-) gt OH^(-) gt CH_3CH_2^-` ANSWER :A