This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Gangliosides consists of 
Select and explain. 
A. Long chain fatty acid (LCFA), B. Alcohol-sphingosine, C. Sailic acid, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Ganglioside = ceramide + oligosaccharide chain (e.g. glucose + galactose) + sialic acid (N-acetylneuramic acid).

or

Ganglioside = sphingosine + long chain fatty acid + oligosaccharide chain + sialic acid (NANA).