Sperms of both Funaria and Pteris were released together near the archegonia of Pteris. Only the sperms of Pteris enter the archegonia because,

Pteris archegonia repels Funaria sperms.

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Funaria sperms get killed by Pteris sperms.

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Funaria sperms are less mobile

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Pteris archegonia release chemicals to attract its sperms.

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Solution

The correct option is D
Pteris archegonia release chemicals to attract its sperms.

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.

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