Multiple choice

The first stable compound formed in photosynthesis of C3 plants is

  1. phosphoglyceric acid

  2. starch

  3. pyruvic acid

  4. ribulose diphosphate

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A Correct answer
Explanation

In C3 photosynthesis, the first stable product of carbon fixation is 3-phosphoglyceric acid (3-PGA). It is formed when carbon dioxide reacts with ribulose-1,5-bisphosphate.