This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Pathology
Foam cells are formed by? 
Select and explain. 
A. Neutrophills, B. Fibroblasts, C. Macrophages, D. All of them
C: Macrophages
Answer: C: Macrophages 
Explanation: Ans. is 'c' i.e., Macrophages * Foam cells are lipid-laden cells that derive predominantly from macrophages (M2 type), but smooth muscle cells can also imbibe lipid to become foam cells.* They are seen in atherosclerosis.