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
Increased LAP score is seen in: 
Select and explain. 
A. Chronic myeloid leukemia, B. Myelofibrosis, C. PNH, D. Megaloblastic anemia
B: Myelofibrosis
Answer: B: Myelofibrosis 
Explanation: None