How many molecules of ATP and NADPH are required for every molecule of $\mathrm{CO}_2$ fixed in the Calvin cycle?

• A

  2 molecules of ATP and 2 molecules of NADPH
• B

  3 molecules of ATP and 3 molecules of NADPH
• Correct answer
  C

  3 molecules of ATP and 2 molecules of NADPH
• D

  2 molecules of ATP and 3 molecules of NADPH

Hence, the correct answer is option: 'C'.