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

Correct Answer: B