Sphingomyelin contains Bbibepute oguH unu HeCKO/TbKO OTBeTOB: Phosphate group Fatty acid Glycerol Choline Serine

Sphingomyelin is a type of sphingolipid found in animal cell myelin sheath that surrounds nerve cell axons. It contains a sphingosine backbone, a ceramide, and a phosphate group. The phosphate group is attached to the sphingosine backbone, forming the sphingomyelin molecule. Therefore, the correct answer is "Phosphate group".