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
Toll like receptors are present in 
Select and explain. 
A. PMNs, B. Reticuocytes, C. Reticuocytes, D. Leukocytes
D: Leukocytes
Answer: D: Leukocytes 
Explanation: Toll-like receptors (TLRs)
Microbial sensors that recognize products of bacteria (such as endotoxin and bacterial DNA), viruses (like DS-RNA), and other pathogens.
TLRs are located in plasma membranes and endosomes of leukocytes, so they are able to detect extracellular and ingested microbes.