The correct decreasing order of basic strength of the following species is ….. `H_(2)O, NH_(3), OH^(-),NH_(2)^(-)`
A. `NH_(2)^(-) gt OH^(-) gt NH_(3) gt H_(2)O^(-)`
B. `OH^(-) gt NH_(2)^(-) gt H_(2)O gt NH_(2)^(-)`
C. `NH_(3) gt H_(2)O gt NH_(2)^(-) gt OH^(-)`
D. `H_(2)O gt NH_(3) gt OH^(-) gt NH_(2)^(-)`