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
Most common differential diagnosis for appendicitis in children is 
Select and explain. 
A. Gastroenteritis, B. Mesentric lymphadenopathy, C. Intussusception, D. Meckel's diveiculitis
B: Mesentric lymphadenopathy
Answer: B: Mesentric lymphadenopathy 
Explanation: 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