This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Decreased LAP score is found in: March 2007 
Select and explain. 
A. Leukaemoid reaction, B. Myelofibrosis, C. Pernicious anemia, D. Polycythemia
C: Pernicious anemia
Answer: C: Pernicious anemia 
Explanation: Ans. C: Pernicious anemia Leukocyte alkaline phosphatase is a test how much alkaline phosphatase (ALP) is inside white blood cells. A. Higher-than-normal results may be due to: Leukemoid (leukemia-like) reaction Myelofibrosis Polycythemia vera. B. Lower-than-normal results may be due to: Aplastic anemia Chronic granulocytic leukemia Pernicious anemia.