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Question

If a person is suffering from Christmas disease then he is deficient of

A
Factor IX
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B
Homogentisic acid
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C
Thrombin
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D
Vitamin C
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Solution

The correct option is A Factor IX
Haemophilia B is a blood clotting disorder, caused by a mutation of the factor IX gene, leading to a deficiency of factor IX. It is the second most common form of haemophilia. It is sometimes called, Christmas disease, named after Stephen Christmas, the first patient described with this disease.

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