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: Surgery
[{'content': "Retractile mesenteris may be seen in: \nSelect and explain. \nA. Ormond's disease, B. Gardner's disease, C. Turner's syndrome, D. Down's syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Retractile Mesenteritis Retroperitoneal fibrosis has been associated with a variety of sclerosis disease, among these is a variant known as retractile mesenteritis Involve predominantly the mesentry of small intestine and associated vessels, involvement of mesocolon and colon is less frequent. Ref: Schwaz 10th edition Pgno: 1458', 'role': 'assistant'}]