The product of the dark reaction is

Explanation

The correct answer is glyceraldehyde 3-phosphate (G3P), which is the primary carbohydrate product of the Calvin cycle, also known as the dark reactions. During these reactions, ATP and NADPH generated in the light-dependent reactions are used to convert carbon dioxide into G3P, a three-carbon sugar. This process occurs in the stroma of chloroplasts. The other options, ATP and NADPH, are products of the light-dependent reactions, while PEP is not related to photosynthesis but rather to glycolysis.