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: Pathology
[{'content': 'What is true about ulcerative colitis ? \nSelect and explain. \nA. Involves rectum and then whole colon backwards, B. Involves only colon, C. Skip lesions seen, D. Ileum not involved', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is- A Ulcerative colitis (UC) is a long-term condition that results in inflammation and ulcers of the colon and rectum.', 'role': 'assistant'}]