This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute Appendicitis, Subject name: Surgery
[{'content': 'Which of the following is not a sign of appendicitis? \nSelect and explain. \nA. Rovsing s sign, B. Murphy s sign, C. Obturator sign, D. Psoas sign', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Murphy's signRef: Sabiston 19thed ch-49", 'role': 'assistant'}]