A Patient with Peptic Ulcer Disease Is Found to Require

A patient with peptic ulcer disease is found to require larger than usual doses of omeprazole to cure her peptic ulcer. Which drug metabolism phenotype is most likely present in this patient?

A) CYP2D6 poor metabolizer phenotype
B) CYP2D6 extensive metabolizer phenotype
C) CYP2C19 poor metabolizer phenotype
D) CYP2C19 extensive metabolizer phenotype
E) rapid acetylation phenotype