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': "Most common differential diagnosis for appendicitis in children is \nSelect and explain. \nA. Gastroenteritis, B. Mesentric lymphadenopathy, C. Intussusception, D. Meckel's diveiculitis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Differential diagnosis of acute appendicitis in children Gastroenteritis Mesenteric adenitis Meckel's diveiculitis Intussusception Henoch-Schonlein purpura Lobar pneumonia Ref: Bailey & Love&;s Sho Practice of Surgery,E25,Page-1209", 'role': 'assistant'}]