Which of the following diseases is also called Christmas disease?
A
Sickle-cell anaemia
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B
Haemoglobinuria
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C
Myocardial infarction
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D
Haemophilia-B
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Solution
The correct option is D Haemophilia-B Haemophilia B is due to deficiency of factor IX (Christmas factor). The patient may experience prolonged bleeding following any injury of wound, and in severe cases there is spontaneous bleeding into muscles and joints.