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
[{'content': 'Multiple sclerosis is characterized by a loss of which lipids: \nSelect and explain. \nA. Phospholipids and sphingolipids, B. Sphingolipids and ceramide, C. Phospholipids and ceramide, D. Sphingolipids and gangliosides', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Multiple sclerosis Demyelinating disease Loss of Phospholipids & Sphingolipids from white matter. CSF shows | phospholipid levels', 'role': 'assistant'}]