The question:

Which of the following statements regarding the Primal Fangs mutation is correct?
1. It can be bred randomly from non-mutated parents.
2. It can be bred randomly from a non-mutated father and a Primal (Felis) mother.
3. It can naturally pass down from a basic Primal mother.
4. It can be bred randomly from a non-mutated father and a Primal (Ferus) mother.

It's not #1 as it's a "fail" from passable primals, not random.
It's not #2 because the answer states non-mutated father and Felis mother. Felis females do not pass down their mutation at all and obviously a non mutated father cannot spawn the mutation, so this cannot be the answer.
It's not #3 as female primals cannot pass their mutation.
It is #4 as Ferus female do pass mutation naturally and can therefore pass the fail mutation as well.

When you refer to your felis, you are referring to a Felis male. The answer refers to a non-mutated male.

Hope this helps somewhat!

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