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: Anatomy
Best site for taking biopsy for viral esophagitis is 
Select and explain. 
A. Edge of ulcer, B. Base of ulcer, C. Adjacent induratrd area around ulcer, D. Surrounding normal mucosa
B: Base of ulcer
Answer: B: Base of ulcer 
Explanation: Refer Robbins page no 768 Herpes virus typically cause punched out ulcers the nuclear inclusions of herpes virus arr found in a narrow rim of degenerating epithelial cells at the margin of ulcer For biopsy should be taken from edge of ulcer in HSV and base of ulcer in CMV