Option B: The multicellular gametophytes are produced by spores from ovules & anthers.
The gametophyte is one of the two alternative multicellular phases in the life cycles of plants and algae. It develops from a single-chromosome haploid spore into a multicellular haploid organism. Gametophyte refers to the sexual stage in the life cycle of plants and algae.
To produce haploid spores, meiosis takes place in diploid sporophyte cells. Each spore undergoes mitosis, resulting in the production of a multicellular, haploid gametophyte. To produce gametes, the gametophyte must go through mitotic divisions. The diploid sporophyte is created when two gametes unite.
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