This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'Non specific esterase is positive in all the categories of AML except- \nSelect and explain. \nA. M3, B. M4, C. M5, D. M6', 'role': 'user'}, {'content': 'Answer: D \nExplanation: M6 is positive for periodic acid Schiff in the case of erythroblasts and myeloperoxidase in the case of myeloblasts. Reference: textbook of Pathology 6th edition Author Harsh Mohan, page number 364.', 'role': 'assistant'}]