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: Pathology
[{'content': "Primaiy sclerosing cholangitis is associated with \nSelect and explain. \nA. Ulcerative colitis, B. Carcinoma gall bladder, C. Crohn's disease, D. Intestinal tuberculosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ulcerative Colitis Ulcerative colitis is closely related to Crohn disease. However, ulcerative colitis is limited to the colon and rectum. Some extraintestinal manifestations of ulcerative colitis overlap with those of Crohn disease, including migratory polyahritis, sacroiliitis, ankylosing spondylitis, uveitis, skin lesions, pericholangitis, and primary sclerosing cholangitis. TEXT BOOK OF ROBBINS BASIC PATHOLOGY NINTH EDITION PAGE.590', 'role': 'assistant'}]