This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Myelogenous Leukemia, Subject name: Pathology
[{'content': 'Leucocyte alkaline phosphatase (LAP) is raised in all conditions except: \nSelect and explain. \nA. Myelofibrosis, B. Essential thrombocythemia, C. Chronic myeloid leukaemia, D. Polycythemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Low LAP scores have been associated with CML, PNH, thrombocytopenic purpura, and hereditary hypophosphatasia. In CML regardless of the total white count, the score remains low.', 'role': 'assistant'}]