Which of the following does not represents the correct order of the property indicated ?
A. `Sc^(3+) gt Cr^(3+) gt Fe^(3+) gt Mn^(3+)` ionic radii
B. `Sc lt Ti lt Cr lt Mn`density
C. `Mn^(2+) gt Ni^(2+) lt CO^(2+) lt Fe^(2+)` ionic radii
D. `FeO lt CaO gt MnO gt CuO` basic nature