This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver & Biliary Tract, Subject name: Pathology
[{'content': 'Kupffers cells in liver are \nSelect and explain. \nA. Macrophages, B. Lymphocytic, C. Complimentary proteins, D. Coagulation proteins', 'role': 'user'}, {'content': "Answer: A \nExplanation: A. i.e. (Macrophages) (54- Basic pathology 8th)Kupffer cells belonging to the reticuloendothelial systemsMarophages the dominant cells of chronic inflammation, are tissue cells derived from circulating blood monocytes, macrophages also found in(i) Liver - Kupffer cells(ii) Spleen and lymph node - Sinus histiocytes(iii) CNS - Microglial cells(iv) Lungs - Alveolar macrophages* The half life of circulating monocytes is about 1 day* Mean life of RBC's in transfused blood is - 80 days*** Langerhans cels are antigen presenting in nature*** Epitheloid cells and granular giant cells are formed by Monocyte - macrophages*** Antigen presenting cells are - Langerhan's cells Dendritic cells, B. cells, Macrophages", 'role': 'assistant'}]