True, DNA is DNA, it matters not wether or not it belongs to a plant, you could mix a carrot with a pig (not sure why you would, but you can)
Answer:
The sporophytes of ferns grow through the rhizome
Explanation:
The gametophyte are responsible for sexual reproduction in plants while the sporophytes are usually responsible for asexual reproduction in plants.
Sporophytes are found in the rhizomes of plants and they help in the asexual reproduction.
This is how rhizomes are involved in asexual reproduction of ferns
I think c and d is the best answers