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Ectophloic siphonostele is found in
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- Osmunda and Equisetum
- Marsilea and Botrychium
- Adiantum and Cucurbitaceae
- Dicksonia and Maidenhair fern
Correct Option: A
The central pith is surrounded by xylem, phloem, pericycle and endodermis. The phloem occurs only outside the xylem e.g Equisetum, Osmunda. pith Xylem Phlorm Endoderm