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Ectophloic siphonostele is found in

(a) Adiantum and Cucurbitaceae

(b) Osmunda and Equisetum

(c) Marsilea and Botrychium

(d) Dicksonia and maiden hair fern

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Best answer

Correct option  (b) Osmunda and Equisetum

Explanation:

In the ectophloic siphonostele, the xylem surrounds pith and this xylem is surrounded by phloem, pericycle and endodermis respectively e.g. Osmunda and Equisetum.

            Ectophlolc siphonostele

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