Raphides are

Starch

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Silica

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Calcium carbonate

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Calcium oxalate

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Both C and D

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Solution

The correct option is D Both C and D
Raphides are needle-shaped crystals of calcium oxalate or calcium carbonate. It occurs in parenchyma cells in the leaves generally confined to the mesophyll. It can produce severe toxic reactions by facilitating the passage of toxin through the skin.
So, the correct answer is option E.

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