(B) : In gymnosperms (like $Pinus$),the male and female gametophytes do not have an independent free-living existence.They remain within the sporangia

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(B) : In gymnosperms (like $Pinus$),the male and female gametophytes do not have an independent free-living existence.They remain within the sporangia retained on the sporophytes,$i.e.$,the female gametophyte (within the megasporangium) and the male gametophyte (within the microsporangium).