Q179 / 200 · NEET 2003 · Zoology

Christmas disease is another name for

  • Correct answer
    A
    haemophilia B
  • B
    hepatitis B
  • C
    Down's syndrome
  • D
    sleeping sickness

Solution

Christmas disease, also called haemophilia B or factor IX haemophilia is a genetic disorder caused by missing or defective factor $\mathrm{IX}$, a clotting protein. Haemophilia $\mathrm{A}$ is caused by a lack of the blood clotting factor VIII.

Hence, the correct answer is option: 'A'.

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