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
Which of the following is not a component of triglycerides? 
Select and explain. 
A. Glycerol, B. Linoleic acid, C. Palmitic acid, D. Sphingosine
D: Sphingosine
Answer: D: Sphingosine 
Explanation: Triacylglycerols Neutral lipids Made up of glycerol and fatty acids. Linoleic acid and palmitic acid are fatty acids. Sphingosine Amino alcohol Component of sphingolipids.