A) Downs syndrome
B) sleeping sickness
C) haemophilia-B
D) hepatits-B
Correct Answer: C
Solution :
Christmas disease is another name for haemophilia-B characterized by the deficiency of factor IX. Downs syndrome is the disorder results when one chromosome (21st chromosomes in human beings) is present in 3 copies. Trypanosoma, is a protozoan, which causes sleeping sickness (African trypanosomiasis). Hepatitis-B is caused by the hepatitis virus (HBV).
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