How Are the FAB and WHO Classifications Different with Respect

How are the FAB and WHO classifications different with respect to acute leukemias?

A) FAB classifies acute leukemias by lineage morphology, whereas WHO classifies acute leukemias by immunophenotyping.
B) FAB classifies acute leukemias by their precursor conditions, whereas WHO classifies acute leukemias by DNA profiling.
C) Acute leukemia is classified by FAB as having greater than 30% blasts, whereas WHO classifies acute leukemia as having greater than 20% blasts.
D) Both a and c

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