Is papaya are c4 plant

No, papaya is not a C4 plant; it is classified as a C3 plant. C3 plants use the Calvin cycle for photosynthesis, which is typical for many species in temperate climates. C4 plants, on the other hand, have a different photosynthetic pathway that allows them to efficiently fix carbon dioxide in hot and dry environments, like maize and sugarcane. Papaya thrives in tropical climates, but it does not possess the C4 photosynthetic mechanism.