How many molecules of ATP and NADPH are required for every molecule of CO2 fixed in the Calvin cycle?

1. A. 2 molecules of ATP and 3 molecules of NADPH
2. B. 2 molecules of ATP and 2 molecules of NADPH
3. C. 3 molecules of ATP and 3 molecules of NADPH
4. D. 3 molecules of ATP and 2 molecules of NADPH

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