This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'All the following are diagnostic barium follow-through features of ileocecal tuberculosis except \nSelect and explain. \nA. Pulled up contracted caecum, B. Widening of ileocecal angle, C. "Wind-sock" appearance of duodenum, D. Strictures involving terminal ileum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]