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': 'Nieman pick disease is due to deficiency of - \nSelect and explain. \nA. Sphingomyelinase, B. Ceramidase, C. Galactosidase, D. Glucosidase', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Sphingomyelinase", 'role': 'assistant'}]