<prompt> Conditions predisposing to leukemia include all except-Ionising radiationMyelofibrosisInflectious mononucleosisPolycythemia vera  <response>: Ans. is c i.e., Inflections mononucleosis Conditions predisposing to acute leukemias o Myelodysplastic syndrome o Ataxia telangiectasia o Chronic myeloproliferative disorders o Down syndrome o Iosnizing radiation and ceain toxic chemicals. o Klinefelters syndrome o Bloom syndrome o Neurofibromatosis o Fanconi anemia 