In the ‘Regeneration’ stage of the Calvin cycle:
1. Five G3P molecules produce three RuBP molecules, using up three molecules of ATP.
2. Three G3P molecules produce five RuBP molecules, using up three molecules of ATP.
3. Three G3P molecules produce five RuBP molecules, using up five molecules of ATP.
4. Five G3P molecules produce three RuBP molecules, using up five molecules of ATP.