When using and electronic cell coulter counter, which of the following results can occur in the presence of cold agglutinins.. ↑MCV & ↑MCHC

When using and electronic cell coulter counter, which of the following results can occur in the presence of cold agglutinins:
a. ↑MCV & ↓MCHC
b. ↓MCV & ↓MCHC
c. ↓MCV & ↑MCHC
d. ↑MCV & ↑MCHC
e. ↑MCV & decreased RBC
f. ↑MCV & normal RBC
h. ↓MCV and RBC

(d) A high titer of cold agglutinin cause falsely ↑MCV, MCH and MCHC and falsely ↓ RBC count.
To correct, incubate at 37°c for 15-30 minutes and rerun the specimen.