Acid is used in the quantification of hemoglobin F laboratory test because:
a. Fetal cells are resistant to acid, which facilitates quantification of hemoglobin F.
b. Adult cells are resistant to acid, which facilitates quantification of hemoglobin F.
c. Acid inhibits other interfering hemoglobins.
d. Acid lyses RBCs to release hemoglobin F
Correct Answer: A
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