Question

the disease of coagulation that is inherited in a sex - linked recessive manner and causes a deficiency of factor ix.
von willebrand disease
anaphylactoid purpura
christmas factor
disseminated intravascular coagulation

Explanation:

• von Willebrand disease: It is related to von Willebrand factor, not Factor IX deficiency.
• Anaphylactoid purpura: Also known as Henoch - Schönlein purpura, it is a small - vessel vasculitis, not a coagulation factor deficiency disorder.
• Christmas factor (Factor IX): Hemophilia B is caused by a deficiency of Factor IX, and it is inherited in a sex - linked recessive manner.
• Disseminated Intravascular Coagulation (DIC): It is a complex disorder of the coagulation system caused by various underlying diseases, not a single - factor deficiency due to genetic inheritance in a simple sex - linked recessive way.

Answer:

Christmas factor