This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Leukemias and Lymphoma, Subject name: Pediatrics
Most common gastrointestinal malignancy of childhood is? 
Select and explain. 
A. Adenocarcinoma, B. Lymphoma, C. Carcinoid, D. Sarcoma
B: Lymphoma
Answer: B: Lymphoma 
Explanation: ANSWER: (B) LymphomaREF: Atlas of pediatric gastrointestinal disease: Part 1 - Page 87"Lymphoma is the most common malignant tumor of the gastrointestinal tract in children"