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
The epitheloid cell and multinucleated gaint cells of Granulomatous inflammation are derived from ? 
Select and explain. 
A. Basophils, B. Eosinophils, C. CD 4 - T lymphocytes, D. Monocytes - Macrophages
D: Monocytes - Macrophages
Answer: D: Monocytes - Macrophages 
Explanation: Ans. is 'd' i.e., Monocyte macrophages In granulomatous inflammation o Main cells involved ----> Macrophages, CD-4 helper T cells. Epitheloid cells - Macrophages that develop epithelial like appearance. Multinucleated giant cells -4 Due to fusion of epitheloid cells.