Leucocyte alkaline phosphatase (LAP) is raised in A/E-: (A) Myelofibrosis, (B) Essential thrombocythemia, (C) Polycythemia, (D) Chronic myeloid leukemia
Answer is D. Ans. is 'd' i.e., Chronic myeloid leukemiao Low LAP score is seen in : -(i) CML(ii) Paroxysmal nocturnal hemoglobinuria(iii) Hematological neoplasma (rare)(iv) Myelodysplastic syndrome(v) Rare infections or toxic exposureo Myelofibrosis, polycythemia vera and essential thrombocytosis (thrombocythemia) are myeloproliferative disorders in which LAP score is increased.