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: Radiology
Scalloping of the edge of the sigmoid colon on barium enema seen in – 
Select and explain. 
A. Diverticulosis, B. Ulcerative colitis, C. Carcinoma colon, D. Pneumatosis intestinalis
B: Ulcerative colitis
Answer: B: Ulcerative colitis 
Explanation: Scalloping of the edge of sigmoid colon on barium enema is seen in ulcerative colitis.