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Question

Periderm is formed by:

A
Phellem
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B
Phellogen
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C
Phelloderm
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D
All of these
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Solution

The correct option is C Phellogen
The periderm is derived from the phellogen, a meristematic region that arises via the dedifferentiation of parenchyma cells in the cortex. The phellogen generates phellem (or cork) to the outside and phelloderm to the inside.
Hence the correct answer is (B)

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