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: Pathology
Tissue macrophages are called? 
Select and explain. 
A. Monocytes, B. Histiocytes, C. Plasma cells, D. Epitheloid cells
B: Histiocytes
Answer: B: Histiocytes 
Explanation: Ans. is 'b' i.e., Histiocytes