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': 'A 42 -year old man was referred with a 2 week history of fever weakness and bleeding gum. Peripherial smear showed pancytopenia. The bone marrow examinationrevelaed 26% blasts frequently exhibiting Auer rods andmature myeloid cells. An occasional neutrophil withpseudo Pelger-Huet anomaly was also noted : Which ofthe following cytocheimcal stains is most likely to bepositive ? \nSelect and explain. \nA. Acid phosphatase, B. Non specific esterase., C. Myeloperoxidase, D. Toluidine blue.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Myeloperoxidase', 'role': 'assistant'}]