Correct increasing order for the wavelengths of absorption in the visible region by the complexes of `Co^(3+)` is:

Options

A. `[Co(H_2O)_6]^(3+),[Co(en)_3]^(3+),[Co(NH_3)_6]^(3+)`
B. `[Co(H_2O)_6]^(3+),[Co(NH_3)_6]^(3+),[Co(en)_3]^(3+)`
C. `[Co(NH_3)_6]^(3+),[Co(en)_3]^(3+),[Co(H_2O)_6]^(3+)`
D. `[Co(en)_3]^(3+),[Co(NH_3)_6]^(3+),[Co(H_2O)_6]^(3+)`

Answer

D