Key Point Only one sigma bond is formed by each surrounding atom and each atom try to complete its octave and only orbitals involved in sigma bond formation or have lone pair of electrons can so for hybridisation. The structure of XeOF4 is as follows:
In the structure of XeOF4, we have five (5) sigma(σ) bonds and one lone pair of electron associated with Xe-atom. Thus, has 5 sigma bonds and 1 lone pair of electron with sp3d2(5+1=6) hybridisation. Hence, option (c) is the correct answer.