The parents are of a different genus and a different species. The parents are of a different species, but of the same genus. The parents are of the same genus and of the same species. The parents are of the same species, but of a different genus.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Two organisms mate and produce offspring. Which of the following statements best explains why the offspring are unable to reproduce?
Possibilities:
- The parents are of a different genus and a different species.
- The parents are of a different species, but of the same genus.
- The parents are of the same genus and of the same species.
- The parents are of the same species, but of a different genus.

The parents are of a different species, but of the same genus.