<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 55-year-old man comes to the physician because of worsening fatigue and recurrent bleeding from his gums for 2 weeks. Physical examination shows marked pallor. There are scattered red, nonblanching pinpoints spots on his trunk and extremities. Laboratory studies show a hemoglobin of 8.0 gdL, a leukocyte count of 80,000mm3, and a platelet count of 104,000mm3. Genetic analysis of a bone marrow aspirate shows leukemic cells with a balanced translocation between the long arms of chromosome 15 and 17. These cells are most likely to stain positive for which of the following?? A: Myeloperoxidase, B: Tartrate resistant acid phosphatase, C: Periodic acid-Schiff, D: Cluster of differentiation 1a, E: Terminal deoxynucleotidyl transferase,  <response>: This is a question about acute promyelocytic leukemia APL. The patient has symptoms of anemia and bleeding, as well as pancytopenia on lab tests. The genetic analysis shows a balanced translocation between chromosomes 15 and 17, which is characteristic of APL. APL cells are abnormal promyelocytes that do not fully differentiate into mature granulocytes. The choices list various stains that can help identify different cell types. Myeloperoxidase stains immature myeloid cells like promyelocytes. Tartrate resistant acid phosphatase stains monocytes. Periodic acid-Schiff stains various cell components. CD1a stains cortical thymocytes. Terminal deoxynucleotidyl transferase stains immature lymphoid cells.Therefore, the APL cells would most likely stain positive for myeloperoxidase.A: Myeloperoxidase 