The question says, 'which of the following is required for dark reaction to take place. The correct option is ATP. Photosynthesis is divided into two parts, light and dark reactions. The dark reaction of photosynthesis does not require light to occur. During the dark reaction, ATP and NADPH combine with water and carbon dioxide to produce glucose. The ADP and the NADPH+ formed are then transferred to the light reaction to continue the cycle.
