What is the composition of phospholipid
Glycerol + phosphate + Choline or ethanolamine
Glycerol + 1 Fatty acid + phosphate + Choline or ethanolamine
Glycerol +  2 Fatty acids + Phosphate + Choline or ethanolamine
Glycerol + 3 Fatty acids + Phosphate + Choline or ethanolamine