<prompt> Which one of the following laboratory test differentiates leukamoid reaction from chronic myeloid leukemia?LAP leukocyte alkaline phosphataseLCA leukocyte common antigenMPO myelo-peroxidaseTRPA tartrate resistant alkaline phosphatas  <response>: Ans. is a i.e., LAP leukocyte alkaline phosphatase o A leukemoid reaction is an exuberant form of ieucocytosiswith leucocyte count upto 50000mm3, that may follow infections.It is difficult to distinguish leukemoid reaction from leukemia.Absence of Philadelphia chromosome and increase in leucocyte alkaline phosphatase score rules out CML. CMLLeukemoidpH chromosomeve-veALPDecreasedIncreased 