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: Surgery
[{'content': "Small intestinal biopsy is diagnostic in :a) Whipple's diseaseb) Abetalipoproteinemiac) Celiac diseased) Agammaglobulinemia \nSelect and explain. \nA. acd, B. bcd, C. abd, D. ab", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]