If the internuclear axis is Z-axis, correct combination (s) of orbitals overlapping and type of bond formed is/are

S-orbital  & S-orbital                                       $\sigma -bond$

$d_{xz}-orbital$   &  $d_{xz}-orbital$                  $\pi -bond$     

$d_{xy}-orbital \& d_{xy}-orbital$                    $\pi -bond$ 

$P_z-orbital \& P_z-orbital$                         $\sigma -bond$