The right option is; B. The Calvin cycle
Photosynthesis can be broken down into two steps; the light and dark reactions. The dark reaction is also known as the Calvin cycle.
The Calvin cycle (dark reaction) is the second stage of photosynthesis that occurs in the stroma (inner fluid) of the chloroplast. This cycle is light independent and it uses the two products of the light reaction which are ATP and NADPH along with carbon dioxide to produce high sugar molecule (glucose) which is transformed by plants into other molecules that is needed by the cell.
