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: Surgery
Commonest site involved in lleocaecal T.B. 
Select and explain. 
A. Intestinal wall, B. Lymph node, C. Mesentery, D. Intestinal mucosa
D: Intestinal mucosa
Answer: D: Intestinal mucosa 
Explanation: None