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': 'Rectum is inflated with air, pain occurs in right iliac fossa. Which sign \nSelect and explain. \nA. Aaron sign, B. Battle sign, C. Bastedo sign, D. Meburney sign', 'role': 'user'}, {'content': 'Answer: C \nExplanation: an obsolete sign: in chronic appendicitis, pain and tenderness in the right iliac fossa on inflation of the colon with air. The definition information forBastedo sign is provided by Stedman&;s.', 'role': 'assistant'}]