Correct Option: C

The plant body of Chlamydomonas is gametophyte (haploid). It reproduces asexually by zoospore formation and sexually by gametes. Gametes are isogametes which fuse to produce diploid zygote which is the only structure representing sporophytic generation.
In Pinus main plant body is sporophyte are is the case with Selaginella and Dryopteris.