This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, 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: Schilling test. The Schilling test is a medical investigation used for patients with vitamin B12 (cobalamin) deficiency. The purpose of the test is to determine how well the patient is able to absorb B12 from their intestinal tract Ref Davidson edition23rd pg 805', 'role': 'assistant'}]