<prompt> A patient presented with splenomegaly, anemia shows reticulocytosis with increased bone marrow cellularity. The diagnosis is:Pernicious anemiaHemolytic anemiaMyelofibrosisHairy cell leukemia  <response>: Hemolytic anemia - reticulocytosis with splenomegaly is seen. Skull and skeletal deformities can occur in childhood due to a marked increase in hematopoiesis and resultant bone marrow expansion 