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': 'True regarding Barium study of ileocaecal tuberculosis \nSelect and explain. \nA. String sign, B. Goose neck sign, C. Rt sided obstruction, D. Pulled up caecum', 'role': 'user'}, {'content': "Answer: A \nExplanation: .Barium study X-ray (Enteroclysis followed by barium enema or barium meal follow through X-ray) in ileocaecal tuberculosis reveals, * Pulled up caecum * Obtuse ileocaecal angle * Hurrying of barium due to rapid flow and lack of barium in inflamed segment (Steirlin sign) * Narrow ileum with thickened ileocaecal valve (Fleischner sign) (Inveed umbrella sign) * Calcifications * Other signs are - persistent narrow stream (string sign); multiple strictures with enormous dilatation of proximal ileum (mega ileum); straightening of ileo caecal junction with 'goose neck' deformity. ref:SRB&;s manual of surgery,ed 3,pg no 514", 'role': 'assistant'}]