For a patient with hemophilia B, which of the following statements is TRUE?

A) The patient's father had hemophilia B, and the mother was a carrier of the defective gene.
B) The patient's father had hemophilia B, and the mother was unaffected.
C) The patient's father was a carrier for the defective gene, and her mother did not carry the defective gene.
D) The patient's mother was a carrier for the defective gene, and her father did not carry the defective gene.

D