A Differential Is Performed on a Bone Marrow Specimen Obtained

Multiple Choice

A differential is performed on a bone marrow specimen obtained from a patient suspected of having CML in blast crisis. The results are as follows: 45% blasts, 13% metamyelocytes, 18% myelocytes, 10% promyelocytes, 8% bands, 2% segmented neutrophils, 1% pronormoblasts, 1% basophilic normoblasts, 1% polychromatophilic normoblasts, and 1% orthochromatophilic normoblasts. What is the M:E ratio?

A) 2:1
B) 24:1
C) 12:1
D) 15:1