Gaucher disease is characterized by a deficient enzyme and accumulated substrate. What is the deficient enzyme and accumulated substrate, respectively?
a) Arylsulfatase A, Sulfatide.
b) α-Galactosidase A, Globotriaosylceramide.
c) Glucocerebrosidase, Glucocerebroside.
d) β-Galactocerebrosidase, Galactocerebroside.