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All pteridophytes are heterosporous.

Development of embryo within the female gametophyte which is retained in parental sporophyte is the precursor for seed habit .

All seed plants have archegonia.

All vascular plants are seed plants.

answer is B.

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Detailed Solution

In heterosporous pteridophytes like Selaginella, the female gametophyte is multicellular, retained in the megasporangium and it shows embryo development within the megasporangium.

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