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: Microbiology
All are mononuclear-macrophages except ? 
Select and explain. 
A. Histiocytes, B. Microglia, C. Kupfer cells, D. B-cells
D: B-cells
Answer: D: B-cells 
Explanation: Ans. is 'd' i.e., B-cells Blood macrophages - Monocytes Tissue macrophages - Histocytes Lung - Alveolar macrophages Brain - Microglia Liver - Kupffer cells Bone - Osteoclasts Kidney - Mesangial cells