This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemistry of Lipids, Subject name: Biochemistry
All of the following are phospholipids, EXCEPT? 
Select and explain. 
A. Cardiolipin, B. Cerebroside, C. Sphingomyelin, D. Surfactant lipid
B: Cerebroside
Answer: B: Cerebroside 
Explanation: Phospholipids are those Lipids that contain phosphorus (mainly as a phosphate group) e.g. glycerophospholipids. Cerebrosides is group of glycosphingolipids called monoglycosylceramides. They Do not contain Phosphorus (see fig below). Sphingomyelin is the only sphingolipid with a phosphate group. Surfactants are lipoproteinaceous substances synthesized in alveolar type II cells, which facilitate gas exchange by lowering alveolar surface tension. It contains significant amounts of phospholipid dipalmitoyl phosphatidylcholine.