In context with the transition elements, which of the following statements is incorrect ?

Options

A. In the highest oxidation states,the transiton metals show basic character and form cationic complexes.
B. In the highest oxidation states of the first five transition elements (Sc to Mn) , all the 4s and 3d electrons are used for bonding
C. Once the`d^(5)` configuration is exceeded,the tendency to involve all the 3d electrons in bonding decrease.
D. In addition to the normal states, the zero oxidation state is also shown by these elementsin complexes.

Explanation

In the highest oxidation state, transition metals show acidic character and form anionic complexes.