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Eduncle Best Answer
Hornworts (Anthocerotophyta) have only one giant chloroplast per cell and sporophyte body with stomatal opening. Since Marchantiophyta have predominant gametophytic stage which is photosynthetic in nature, they contain numerous chloroplast per cell. Bryophytes have photosynthetic gametophytes and multicellular rhizoid as well as sporophyte body with stomata. So accordingly A should be Bryophyta, B should be Marchantiophyta and C should be Anthocerotophyta.