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': 'Alvarado score consist of \nSelect and explain. \nA. Leucopenia, B. Anorexia, C. Diarrhea, D. Periumbilical pain', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A number of clinical and laboratory-based scoring systems have been devised to assist diagnosis. The most widely used is the Alvarado score, A score of 7 or more is strongly predictive of acute appendicitis. Symptoms are : score Migratory RIF pain 1 Anorexia 1 Nausea and vomiting 1 Ref: Bailey & Love&;s Sho Practice of Surgery,E25,Page-1211', 'role': 'assistant'}]