This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurocutaneous syndromes, Subject name: Pediatrics
[{'content': 'Which among the following is the most common tumor associated with neurofibromatosis in a child? \nSelect and explain. \nA. Juvenile myelomonocytic leukemia, B. Acute lymphoblastic leukemia, C. Acute monocytic leukemia, D. Acute myeloid leukemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Patients with neurofibromatosis type 1 and Noonan syndrome have a predilection for JMML, since they have germline mutations involved in RAS signaling. AML and ALL are associated with DOWN syndrome.', 'role': 'assistant'}]