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: Surgery
Toxic megacolon is a known complication of - 
Select and explain. 
A. Pseudomembranous colitis, B. Ulcerative colitis, C. Amebic colitis, D. Hirschprung's disease
B: Ulcerative colitis
Answer: B: Ulcerative colitis 
Explanation: None