<prompt> Which among the following is the most common tumour associated with neurofibromatosisminna Child ?Juvenile myelomonocytic leukemiaAcute lymphoblastic leukemiaAcute monocytic leukemiaAcute myeloid leukemia  <response>: Ans. is a i.e., Juvenile myelomonocytic leukemia Among leukemias, Neurofibromatosis - 1 is associated with nonlymphocytic leukemia paicularly JMML and myelodysplastic syndrome. Tumors associated with NF - 1 o Leukemia o Rhabdomyosarcoma o Optic glioma o Brain tumors Meningiomas, ependymomas, Astrocytomas o Pheochromocytomas o Neuro-ectodermal malignancies 