This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': "Most common tumor in children is - \nSelect and explain. \nA. Leukemia, B. Lymphoma, C. Wilm's tumor, D. Neuroblastoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is `a' i.e., Leukemias o Most common childhood tumor --> Leumemia o Most common childhood leukemia --> ALL o Most common solid tumor of childhood --> Brain tumor o Most common tumor in infancy -----> Neuroblastoma o Most common abdominal tumor in child ----> Neuroblastoma", 'role': 'assistant'}]