Which of the following best describes the principle of the Kleihauer-Betke test?
A) Fetal hemoglobin is resistant to acid elution and remains in the cell to stain pink, whereas adult cells appear as ghost cells.
B) Adult hemoglobin is resistant to acid elution and remains in the cell to stain pink, whereas fetal cells appear as ghost cells.
C) D-positive cells from the fetus form rosettes around the IgG-coated mother's cells.
D) Indicator cells form rosettes around the fetal D-positive cells.
Correct Answer:
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