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Question

Which of the following is an aquatic fern?

A
Adiantum
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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 C Salvinia
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.
So the correct option is C.

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