# Which among the following is elevated in hemophilia A?
(A) PT
(B) CT
(C) APTT
(D) PT and APTT
The correct answer is C. APTT.
PT (prothrombin time) is typically normal in hemophilia A. Hemophilia A is a genetic disorder that affects the coagulation system, specifically the clotting factor VIII. PT measures the extrinsic pathway of coagulation, which is not affected in hemophilia A. Instead, hemophilia A patients typically have a prolonged activated partial thromboplastin time (aPTT), which measures the intrinsic pathway of coagulation.
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