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
Alvarado score consist of 
Select and explain. 
A. Leucopenia, B. Anorexia, C. Diarrhea, D. Periumbilical pain
B: Anorexia
Answer: B: Anorexia 
Explanation: 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