Match the following :

	List-I  (molecules)		List-II (overlapping)
A)	C2H4	I)	p – p and sp – p
B)	C6H6	II)	sp2 – sp2, sp2 – s and p – p
C)	PCl5	III)	sp2 – sp2, sp2 – p and s - s
D)	CO2	IV)	sp3d – p

	(A)	(B)	(C)	(D)
1)	II	III	IV	I
2)	II	III	I	IV
3)	II	II	IV	I
4)	II	I	III	IV

C₂H₄: ${\mathrm{H}}_2\underset{{\mathrm{sp}}^2}{\mathrm{C}}=\underset{{\mathrm{sp}}^2}{\mathrm{C}}{\mathrm{H}}_2$ : sp² – sp², sp² – s and p – p overlappings are possible

C₆H₆ : Each carbon under goes sp² hybridization, So sp² – sp², sp² – s and p – p overlappings are possible.

PCl₅ : sp³d hybridization, so sp³d – p overlappings are possible.

CO₂ : sp hybridization :  p – p and sp – p overlappings are possible.