Among the following pair of complexes, in which case the `triangle_(0)` value is higher for the first one?

Options

A. `[Co(NH_(3))_(6)]^(3+)" and "[Co(CN)_(6)]^(3-)`
B. `[CoF_(6)]^(3-)" and "[Co(NH_(3))_(6)]^(3+)`
C. `[Co(H_(2)O)_(6)]^(2+)" and "[Co(H_(2)O)_(6)]^(3+)`
D. `[Rh(H_(2)O)_(6)]^(3+)" and "[Co(H_(2)O)_(6)]^(3+)`

Answer

D

Explanation

Down the group, C.F. splitting increases `40-50%`.