This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of lipid, Subject name: Biochemistry
[{'content': 'Metachromatic leukodystrophy is due to deficiency of \nSelect and explain. \nA. Hexosaminidase A, B. Hexosaminidase B, C. Ceramidase, D. Arylsulfatase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: DiseaseEnzyme deficiencySymptomsMetachromaticleukodystrophyArylsulfatase AMental retardation and psychologic disturbances in adults; demyelinationRef: Harper&;s Biochemistry; 30th edition; Chapter 24 Metabolism of Acylglycerols & Sphingolipids', 'role': 'assistant'}]