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
Leukocyte alkaline phosphate is increased in all,except- 
Select and explain. 
A. Polycythyemia vera, B. CML, C. Myelofibrosis, D. Myeloid metaplasia
B: CML
Answer: B: CML 
Explanation: None