<prompt> Which is the most common tumor associated with type I neurofibromatosis?Optic nerve gliomaMeningiomaAcoustic schwannomaLow grade astrocytoma  <response>: Ans. a Optic nerve gliomaRef: Robbins 9thpg 298NF1 patients have increased risk of Meningioma Q, Pheochromocytoma Q Wilms Tumor QMost common tumor in NF1 is optic nerve glioma QMost common Leukemia in NF1 is JMML Q Juvenile Myelomonocytic Leukemia 