- A three
- B four
- C five
- D six
Correct answer: A. three
Explanation: In C3 plants the first product is 3-phosphoglycerate, a 3-carbon compound.
Concept context
Light reactions, the Calvin cycle, C3/C4/CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.