Correct Answer: B
Explanation:
The carbonyl group is composed of one sigma, and one pi bond. The carbon and oxygen of carbonyl groups are sp2 hybridized. The pi- bond is formed by overlap of unhybridized p-orbitals. Two unshared electron pairs of oxygen occupy sp2 hybrid orbitals of oxygen. All the three groups connected to the carbonyl carbon atom lie in one plane. The bond angles are approximately 120° each.