Which pair of the following plants represents | vedclass

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(A) In $Euphorbia$ (family $Euphorbiaceae$) and $Ziziphus$ (family $Rhamnaceae$),the stipules are modified into spines.These spines serve as a protect

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Euphorbia and Ziziphus

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(A) In $Euphorbia$ (family $Euphorbiaceae$) and $Ziziphus$ (family $Rhamnaceae$),the stipules are modified into spines.These spines serve as a protective mechanism for the plant against herbivores.In contrast,in plants like $Bougainvillea$ and $Citrus$,the spines are modifications of the stem (axillary buds) rather than stipules.

Which pair of the following plants represents the condition of modification of stipules into spines?

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