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Which one is a C4-plant?

1. Papaya
2. Pea
3. Potato
4. Maize/Corn

Correct answer: Maize/Corn

Solution

Maize/Corn is a C4 plant because it fixes carbon first into a four-carbon compound using PEP carboxylase, which helps reduce photorespiration. Papaya, pea, and potato are C3 plants.

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