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: Pathology
[{'content': "Which of the following is a histological feature of whipple's disease \nSelect and explain. \nA. Infiltration of histiocytes in the lamina propria., B. Granuloma in the lamina, C. Macrophages with PAS (+)ve material inside the lamina propria, D. Eosinophils in the lamina propria", 'role': 'user'}, {'content': "Answer: C \nExplanation: Histologically, the affected tissues show presence of characteristic macrophages containing PAS-positive granules and rod-shaped micro-organisms (Whipple's bacilli). These macrophages are predominantly present in the lamina propria of the small intestine and mesenteric lymph nodes. TEXT BOOK PF HARSH MOHAN SIXTH EDITION PAGE.576 IMAGE REF:", 'role': 'assistant'}]