This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glycogen Metabolism and Glycogen Storage, Subject name: Biochemistry
Hexosaminidase A deficiency causes - 
Select and explain. 
A. Tay-sach disease, B. Niemann pick disease, C. Gaucher's disease, D. Krabbe's disease
A: Tay-sach disease
Answer: A: Tay-sach disease 
Explanation: Ans. is 'a' i.e., Tay-sach disease DiseaseEnzyme deficiencyLipid accumulatedTay-sach diseaseHexosaminidase AGM2 gangliosideSandoff diseaseHexosaminidase BGM2 gangliosideNiemann-Pick diseaseSphingomyelinaseSphingomvelineFarber's diseaseCeramidaseAcyl-sphingosine (ceramide)Fabry's diseasea-galactosidaseGlobotrisylceramideKrabbe's diseaseb-galactosidase (Galactosylceramidase)GaiactosylceramideGaucher's diseaseb-glucosidase (glucocerebrosidase)GlucosylceramideMetachromatic leukodystrophyArylsulfatase A3-Sulfogalactosylceramide