This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Krabbes disease is due to deficiency of ? 
Select and explain. 
A. Sphingomyelinase, B. Beta galactocerebrosidase, C. Hexosaminidase, D. Arylsulfatase
B: Beta galactocerebrosidase
Answer: B: Beta galactocerebrosidase 
Explanation: Ans. is 'b' i.e., Beta galactocerebrosidase