Which of the following statement(s) is/are correct?

Options

A. The stability constant of `[Co(H_(2)O)_(6)]^(3+)` is larger than that of `[Co(H_(2)O)_(6)]^(2+)`
B. The cyano complexes more stable than those formed by halide ions .
C. The stability of halide complexes follows the order `I^(Θ)gtBr^(Θ)gtCI^(Θ)gtF^(Θ)` .
D. The stability constant of `[Co(NH_(3))_(4)]^(2+)` is less than that of `[CuCI_(4)]^(2-)` .

Answer

A, B