A patient has a prolonged APTT and anormal PT. The APTT is not corrected by factor Ⅷ-deficient plasma but is corrected by factor Ⅸ-deficient plasma. Which factor does the patient appear to be deficient in
- A、Factor Ⅹ
- B、FactorⅨ
- C、FactorⅧ
- D、Factor Ⅴ
- E、Factor Ⅱ
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