Among the following species the one which causes the highest `CFSE, Delta_(0)` as a ligands is :

Among the following species the one which causes the highest `CFSE, Delta_(0)` as a ligands is :
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Among the following species the one which causes the highest `CFSE, Delta_(0)` as a ligands is : A. `CN^(-)` B. `NH_(3)` C. `F^(-)` D. CO
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