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: Medicine
[{'content': 'The Schilling test is performed to determine the cause of - \nSelect and explain. \nA. Lactose malabsorption, B. Fatty acid malabsorption, C. Amino acid malabsorption, D. Cobalamin malabsorption', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]