The number of CO₂, NADPH₂, and ATP molecules required to synthesize one maltose molecule from the output of the Calvin cycle is, respectively:

Explanation

The synthesis of one glucose molecule via the Calvin cycle requires 6 CO₂, 12 NADPH₂, and 18 ATP molecules. Since maltose is composed of two glucose molecules, twice these values are needed: 24 CO₂, 48 NADPH₂, and 72 ATP molecules. Option A is incorrect because it only provides enough resources for half a glucose molecule. Option B is incorrect, as it accounts for only one glucose molecule. Option D is incorrect because it suggests the resources for four glucose molecules, which is more than necessary for one maltose molecule.