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B
Dryopteris
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C
Salvinia
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D
Equisetum
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Solution
The correct option is CSalvinia Salvinia is an aquatic fern with both annual {e.g., S. nutans) and perennial species {e.g., S. molesta). The plant body consists of a floating stem bearing two rows of large green hairy leaves on the upper surface and highly branched leaf roots on the lower surface.