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': "Pseudopolyps are features of – \nSelect and explain. \nA. Crohn's disease, B. Ulcerative colitis, C. Celiac sprue, D. Whipple's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ulcerative colitis\n\nUlcerative colitis is an inflammatory bowel disease characterized by -\n\n\nInflammation involving only the mucosa and submucosa\nFormation of pseudopolyps\nInvolvement is in a continuous fashion (absent of skip lesions which are characteristic of CD)\n\n\nUlcerative colitis involves the rectum and extends proximally in a retrograde fashion to involve the entire colon (pancolitis) in more severe cases.', 'role': 'assistant'}]