Hemophilia B is due to deficiency of: (A) Factor IX, (B) Factor VII, (C) Factor XI, (D) Factor X
Answer is A. Hemophilia B is also known as Christmas disease
Deficiency of factor 9 X linked recessive



Disorder
Deficiency


Hemophilia A
			​Hemophilia B
			Hemophilia C
Factor 8
			Factor 9
			Factor 11