Which of the following overlaps of atomic orbitals does not form $\mathrm{\pi }-$bond if $\mathrm{z}-$axis is the internuclear axis?

$d_{z^2}-d_{z^2}$ overlaps of atomic orbitals does not form $\mathrm{\pi }-$bond if $\mathrm{z}-$axis is the internuclear axis.

Atomic orbitals connect in a sideways positive (same phase), perpendicular to the internuclear axis direction, to generate pi bonds.

Hence, the option D is correct.