<prompt> Niemann-Pick disease is due to deficiency ofHexosaminidaseSphingomyelinaseGalactokinaseGlucosidase  <response>: It is a lipid storage disease, due to deficiency of sphingomyelinase. Leads to the accumulation of sphingomyelin.Ref: DM Vasudevan, 7th edition, page no: 193 