Moderate

Christmas factor is_____________?

Correct answer: B. PTC

  • A. PTA
  • B. PTC
  • C. VWA
  • D. Prothrombin

Explanation

Christmas factor is factor IX, also called plasma thromboplastin component or PTC, in the intrinsic coagulation pathway. PTA is factor XI, while prothrombin is factor II.

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