A: Seeds are formed by some species of spike | vedclass

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(D) The Assertion is incorrect because spike moss $(Selaginella)$ belongs to the group Pteridophyta,which are seedless vascular plants. While $Selagin

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Both Assertion and Reason are incorrect.

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(D) The Assertion is incorrect because spike moss $(Selaginella)$ belongs to the group Pteridophyta,which are seedless vascular plants. While $Selaginella$ exhibits the 'seed habit' (heterospory and retention of the megaspore),it does not produce true seeds.The Reason is also incorrect because,although $Selaginella$ shows precursors to seed habit,it does not fulfill all conditions required for the formation of a true seed (such as the development of an integumented megasporangium or ovule that matures into a seed).Therefore,both the Assertion and the Reason are incorrect.

$A$: Seeds are formed by some species of spike moss.
$R$: All conditions for seed habit are fulfilled by these species of spike moss.

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$A$: Seeds are formed by some species of spike moss.$R$: All conditions for seed habit are fulfilled by these species of spike moss.