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': "True regarding crohn's disease are A/E ? \nSelect and explain. \nA. Scleroderma, B. Transmural involvement, C. Cobble stone appearance, D. Skin involvement", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Scleroderma The skin involvement in Crohn's disease causes erythema nodosum, scleroderma does not occur in Crohn's disease. Other extra intestinal manifestations of Crohn's disease: I. Migratory polyahritis 2. Sacroiliaitis 5. Hepatic pericholangitis 7. Clubbing 3. Ankylosing spondylitis 4. Uveitis 6. Primary sclerosing cholangitis", 'role': 'assistant'}]