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
Lymphocytic colitis 
Select and explain. 
A. Bloody diarrhea, B. Intra epithelial lymphocytes, C. Lymphocytes is stools, D. Through Ileoscopy look for payer's patches
B: Intra epithelial lymphocytes
Answer: B: Intra epithelial lymphocytes 
Explanation: The characteristic feature of LC is an infiltration by lymphocytes into the colonic epithelium. Collagenous colitis (CC) shares this feature but additionally shows a distinctive thickening of the subepithelial collagen table. LC and CC have been suggested to represent different phases of a single pathophysiologic process, with LC possibly being a precursor or earlier phase of CC; however, this has not been proven. REFERANCE. MEDSCAP.COM IMAGE REF: