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
Which of the following is more characteristic of ulcerative colitis when compared to Crohn's disease (regional enteritis)? 
Select and explain. 
A. segmental involvement, B. granulomas, C. lymph node involvement, D. rectal bleeding
D: rectal bleeding
Answer: D: rectal bleeding 
Explanation: Rectal bleeding is more characteristic of ulcerative colitis, as is malignancy with long-standing disease, but both can occur in regional enteritis. Transmural involvement, lymph node involvement, skip lesions, granulomas, and anorectal complications (abscesses, fistulas, fissures) are characteristic of Crohn's disease.