In general, the Transition elements exhibit their highest oxidation states in their compounds with elements like:

Options

A. C
B. S
C. S and P
D. F and O

Answer

D

Explanation

It is because the unpairing of electrons in d-orbitals require a very high ionisation energy which is not available under bond forming condition.Therefore, transition metal form covalent compounds by simple sharing of electrons with more electronegative O and F.