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: Medicine
Appendicectomy is protective in 
Select and explain. 
A. Irritable bowel syndrome, B. Ulcerative colitis, C. Crohn's disease, D. Caeliac sprue
B: Ulcerative colitis
Answer: B: Ulcerative colitis 
Explanation: There is a protective effect of the previous appendectomy with confirmed appendicitis (reduction of 13-26%), paicularly at a young age, on the development of UCRef: Harrison 19e pg: 1947