Hemophilia B is due to______________?

Correct answer: B. Factor IX deficiency

A. Factor VII deficiency
B. Factor IX deficiency
C. Platelet deficiency
D. it C deficiency

Explanation

Haemophilia B, or Christmas disease, results from deficiency of clotting factor IX. Haemophilia A is the related factor VIII deficiency.

Submitted by a TestUstad contributor and published by the TestUstad editorial teamLast updated 18 September 2026

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