The incorrect statement with regard to haemophilia is :

The correct option is D It is a dominant disease
Haemophilia is sex linked recessive disease, it is usually an inherited bleeding disorder in which the blood does not clot properly. This can lead to spontaneous bleeding as well as bleeding following injuries or surgery. Blood contains many proteins called clotting factors that can help to stop bleeding. Due to this, in an affected individual a simple cut will result in non-stop bleeding.

So, the correct answer is "option B"