This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following cells will proliferate from top to bottom of villi 
Select and explain. 
A. Chief cells, B. Goblet cells, C. Paneth cells, D. Pairetal cells
C: Paneth cells
Answer: C: Paneth cells 
Explanation: Paneth Cells (Zymogen Cells) - These cells are found only in the deeper pas of intestinal crypts. They contain prominent eosinophilic secretory granules. With the EM Paneth cells are seen to contain considerable rough endoplasmic reticulum. Other organelles and some irregular microvilli are present. The cells are rich in zinc. The function of zymogen cells is not well known. They are known to produce lysozyme that destroys bacteria. They may also produce other enzymes. REF :Inderbir Singh's Textbook of Human Histology, Seventh edition, pg.no.,276.