Prothallus of pteridophytes is
small, multicellular, parasitic, thalloid gametophyte
small, multicellular, free-living, photosynthetic thalloid gametophyte
large, unicellular, free-living, photosynthetic thalloid gametophyte
small, multicellular, parasitic, thalloid sporophyte
Prothallus of pteridophytes is small, multicellular, free-living, photosynthetic thalloid gametophyte.