This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
Paneth cells characterized by 
Select and explain. 
A. More number of lysosomal enzyme, B. High concentration of zinc, C. More concentration of EFR, D. Foamy cells
B: High concentration of zinc
Answer: B: High concentration of zinc 
Explanation: Paneth cells are zinc-containing cells widely distributed in Lieberkuhn's crypts of small intestine in many species, but their function has remained obscure. Our previous study showed that a single intravenous injection of diphenylthiocarbazone (dithizone), a zinc chelator, forms zinc-dithizonate complexes in the cytoplasm of Paneth cells to ensure rapid and selective killing of the cells. REFERENCELE nih.gov