<prompt> Best investigation for BCR-ABLFlow cytometryFluorescent in situ hybridizationEISAPolymerase chain reaction  <response>: Ans. b Florescent in situ hybrdizationRef: Robbins 9thpg 170In PCV: Reddening, swelling, and pain in the digits erythromelalgia may occur and are typically associated with extreme platelet elevations. 