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
[{'content': 'Which one of the following laboratory tests differentiates leukemoid reaction from chronic myeloid leukemia ? \nSelect and explain. \nA. LAP (leukocyte alkaline phosphatase), B. LCA (leukocyte common antigen), C. MPO (myelo-peroxidase), D. TRAP (tartrate resistant alkaline phosphatase)', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]