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
[{'content': 'Krabbes disease is due to deficiency of ? \nSelect and explain. \nA. Sphingomyelinase, B. Beta galactocerebrosidase, C. Hexosaminidase, D. Arylsulfatase', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Beta galactocerebrosidase", 'role': 'assistant'}]