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: Medicine
LAP score is decreased in which of the following conditions ? 
Select and explain. 
A. Polycythemia vera, B. CML, C. Myelofibrois, D. AML
B: CML
Answer: B: CML 
Explanation: LAP score is decreased in CML and PNH.