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
Which of the following is the predominant cell type in the intra-epithelial region of small intestinal mucosa? 
Select and explain. 
A. Basophils, B. Plasma cells, C. B lymphocyte, D. T lymphocyte
D: T lymphocyte
Answer: D: T lymphocyte 
Explanation: T lymphocyte predominantly of cytotoxic phenotype (CD8+) constitute the predominant cell type in the intra epithelial region of the mucosa of intestine. The lamina propria consist of helper T cells (CD4+) and educated B cells. Ref: Robbins Pathologic Basis of Disease, 6th Edition, Page 804