This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Surgery
True about Crohn's disease except 
Select and explain. 
A. Recurrence is more common, B. Rectum is involved, C. Fissures are formed, D. Transmural
B: Rectum is involved
Answer: B: Rectum is involved 
Explanation: Crohn's disease (CD) Rectal sparing is characteristic in Crohn's disease. Chronic Transmural inflammatory disorder of GIT with unknown etiology - Can involve any pa - From mouth to Anus - MC sites involved Ileum Ileocecal valve Cecum - Upper GI Crohn's disease has involvement of - Gastric antrum & Duodenum