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Please find below the answer:

The correct option is (3).
Peat moss, also known as Sphagnum show two distinct generations namely gametophyte and sporophyte. The gametophyte is a haploid generation that develops from protonema which is a one layered cell juvenile stage. Germination of a spore leads to the formation of the gametophyte. So, peat moss doe not lack a juvenile phase in its life.

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