<prompt> Haemoglobin F is raised in -Juvenile chronic myeloid leukemiaHereditary spherocytosisCongenital red cell aplasiaMyasthenia gravis  <response>: In juvenile CML, peripheral smear shows leukocytosis.Thrombocytosis anemia are common.Leukocyte alkaline phosphate score is normal or low fetal hemoglobin levels are elevated.Reference :OP Ghai essential pediatrics 8th edition pg no608. 