The correct option is A Parent sporophyte, gametophyte and future sporophyte
A seed is a matured ovule. The matured ovule consists of a seed coat, megagametophyte, and embryo. The seed coat is diploid tissue from the original parent sporophyte. The megagametophyte is a haploid plant, that developed from a megaspore produced by the original sporophyte. The embryo is a new diploid sporophyte.