Choice A rationale:

Hemophilia A and hemophilia B are both types of hemophilia, but hemophilia A is actually less common than hemophilia B.

The prevalence of hemophilia A is about 1 in 5,000 males, whereas hemophilia B occurs in about 1 in 25,000 males.

Therefore, this statement is incorrect.

Choice B rationale:

Hemophilia is not inherited through a defective gene on the Y chromosome.

Hemophilia is an X-linked recessive genetic disorder, which means it is caused by a mutation in genes located on the X chromosome, not the Y chromosome.

This statement is incorrect.

Choice C rationale:

This statement is correct.

Males inherit hemophilia from their mothers who carry the defective gene on one of their X chromosomes.

However, it's important to note that females can also be carriers of the gene and can pass it on to their sons.

This statement does not indicate a need for further teaching.

Choice D rationale:

This statement is incorrect.

While it is very rare for females to have hemophilia, it is not impossible.

Females can inherit hemophilia if they have two affected X chromosomes or if they inherit one affected X chromosome and one affected Y chromosome.

Therefore, this statement does not indicate a need for further teaching.