Multiple choice

Hemophilia is caused by the absence of

  1. Factor IX

  2. Factor VIII

  3. Factor V

  4. Factor XII

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hemophilia A is caused by a lack of the blood clotting factor VIII; about 9 out of 10 people with hemophilia have type A disease. This is also referred to as classic hemophilia or factor VIII deficiency.