Question
Biology Question on human health and disease
Christmas disease is another name for
A
Haemophilia B
B
Hepatitis B
C
Down's syndrome
D
Sleeping sickness
Answer
Haemophilia B
Explanation
Solution
Haemophilia B, a type of haemophilia is also known as Christmas disease. It is due to deficiency of a blood coagulation factor, the Christmas factor (factor IX). Christmas was the person (20th century) in whom the factor was first identified. Haemophilia B is a defect of the blood which prevents its clotting.