The Following Laboratory Results Have Been Obtained for a 40-Year-Old

Multiple Choice

The following laboratory results have been obtained for a 40-year-old woman: PT = 20 seconds (reference range is 11 to 15 seconds) , aPTT = 50 seconds (reference range is 22 to 40 seconds) , and thrombin time = 18 seconds (reference range is 11 to 15 seconds) .What factor deficiency is most likely?

A) Factor VII deficiency
B) Factor VIII deficiency
C) Factor X deficiency
D) Factor XIII deficiency