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': "In which of the following conditions of malabsorption, an intestinal biopsy is diagnostic - \nSelect and explain. \nA. Celiac disease, B. Tropical sprue, C. Whipple's disease, D. Lactose intolerance", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]