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: Pediatrics
[{'content': 'Common site of regional enteritis is – \nSelect and explain. \nA. Colon, B. Rectum, C. Distal ileum and colon, D. Caecum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Crohn disease (Terminal ileitis or regional enteritis) \n\nCrohn disease (CD) is an inflammatory bowel disease (IBD) which is characterized by -\n\n\nSharply delimited and typically transmural involvement of the bowel by an inflammatory process with mucosal damage.\nThe presence of non-caseating granulomas.\nFissuring with the formation of a fistula.\n\n\nAny portion of intestine can be involved but most commonly small intestine is involved.\n\nSmall intestine\xa0\xa0→ 40%\nSmall intestine + colon\xa0\xa0→ 30%\nColon\xa0→ 30%', 'role': 'assistant'}]