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: Dental
Lepra cell is a – 
Select and explain. 
A. Plasma cell, B. Neutrophil, C. Lymphocyte, D. Histiocyte
D: Histiocyte
Answer: D: Histiocyte 
Explanation: Virchow's lepra cells or foamy cells are undifferentiated histiocytes.