Sperms of both Funaria and Pteris were released together near the archegonia of Pteris. Only its sperms enter the archegonia as (a) Pteris archegonia repel Funaria sperms (b) Funaria sperms get killed byPteris sperms (c) Funaria sperms are less mobile (d) Pteris archegonia release chemical to attract its sperms.
Option D Sperms of both Funaria and Pteris were released together near the archegonia. But only the sperms of Pteris enter the archegonia, as Pteris archegonia releases a chemical malic acid to attract its sperms for fertilization
