<prompt> A defect in the enzyme hexosaminidase causesGaucher diseaseFarber diseaseTay-Sachs diseaseKrabbe disease  <response>: DiseaseEnzyme DeficiencyClinical SymptomsTay-Sachs disease Hexosaminidase AMental retardation, blindness, muscular weaknessRef: Harper;s Biochemistry; 30th edition; Chapter 24 Metabolism of Acylglycerols Sphingolipids 