This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Leukemia, Subject name: Medicine
[{'content': 'Which one of the following laboratory test differentiates leukamoid reaction from chronic myeloid leukemia? \nSelect and explain. \nA. LAP (leukocyte alkaline phosphatase), B. LCA (leukocyte common antigen), C. MPO (myelo-peroxidase), D. TRPA (tartrate resistant alkaline phosphatas', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., LAP (leukocyte alkaline phosphatase) o A leukemoid reaction is an exuberant form of ieucocytosiswith leucocyte count upto 50000/mm3, that may follow infections.It is difficult to distinguish leukemoid reaction from leukemia.Absence of Philadelphia chromosome and increase in leucocyte alkaline phosphatase score rules out CML. CMLLeukemoidpH chromosome+ve-veALPDecreasedIncreased", 'role': 'assistant'}]