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B
Leaf spine - Pea
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C
Storage leaf - Onion
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D
Leaf pitcher - Nepenthes
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Solution
The correct option is B Leaf spine - Pea B. Leaf spine - pea
Reason: Leaves are modified into spines in Opuntia (xerophytes), so as to reduce the surface area and minimize rate of water loss by evaporation and transpiration. The spine protects the succulent stem tissue of the cactus.