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: Pathology
[{'content': 'Which of the following statement is false in cytochemistry of AML \nSelect and explain. \nA. Myeloperoxidase and sudan Black are positive, B. Periodic Acid-Sctiff is negative in erythroleukemia, C. Non specific Esterase is positive in M4 and M5, D. All the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Enythroid type of acute mycloid leukemia show PAS positive crythroblast.', 'role': 'assistant'}]