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': "A patient has diarrhea, malabsorption,  Abdominal pain and Arthralgia. On intestinal biopsy PAS + organisms present inside macrophage. Most likely diagnosis is \nSelect and explain. \nA. Celiac sprue, B. Whipple's disease, C. Zollinger - ellison syndrome, D. Chron's disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: PAS+ Organisms inside macrophage clearly s/o whipple's disease.", 'role': 'assistant'}]