The plant life cycle alternates between a sporophyte and a gametophyte. Usually, in the sporophyte stage
Gametes are produced
Only mitosis takes place
The correct option is B
The gametophyte is the haploid phase and a sporophyte is a diploid phase found in some plants and algae that undergo alternation of generations. The sporophyte produces haploid spores (through meiosis) that develop into a gametophyte. The gametophyte is the sexual phase, it develops sex organs that produce gametes that fuse and grow into a sporophyte.