Which of the following has a bond formed by overlap of `sp^(3)-sp`, hybrid orbitals?

Which of the following has a bond formed by the overlap of sp-sp^(3) hybrid orbitals ?

sp^3d^2 hybrid orbitals are

In which of the following molecules, sigma bonds formed by the overlap of sp^3 d and P orbitals are absent ?

In which of the following molecules, sigma bonds formed by the overlap of sp^3 d and P orbitals are absent ?

An sp^(3) hybrid orbital possesses