In which of the following the ratio of hybrid and pure Orbitals is sameI)                            II)  III)                 iv)

Ratio of pure and Hybrid orbitals:i) Number of hybrid orbitals: Sum of  hybrid orbital on all atoms.ii) Number of pure orbitals: Number of atoms other than carbon atom + 2 x Number of π— bonds.A) C2H6 ratio of H.O and P.OH.O = 8P.O= 6 + 2 x 0 = 6H.O : P.O = 8 : 6 = 4 : 3B) C2H4 ratio of H.O and P.OH.O = 3 + 3 =6P.O = 4 + 2 x 1 = 6H.O : P.O = 6 : 6 = 1 : 1C) C2H2 ratio of H.O and P.OH.O = 2 + 2 = 4P.O = 2 + 2 x 2 = 6H.O : P.O = 4 : 6 = 2 : 3D) C6H6 ratio of H.O and P.OH.O = 6 x 3 =18P.O = 6 + 3 x 2 = 12H.O : P. O = 18 : 12 = 9 : 6 =3:2