This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipids, Subject name: Biochemistry
Sphingomyelinase deficiency is seen in: 
Select and explain. 
A. Niemann - Pick disease, B. Fabry's disease, C. Tay Sach's disease, D. Krabbe's disease
A: Niemann - Pick disease
Answer: A: Niemann - Pick disease 
Explanation: Enzyme deficient in Niemann Pick disease is Sphingomyelinase Fig: Sphingolipidoses and their enzyme deficiencies