In C₄ plant, the first stable product of photosynthesis is

✅ Explanation: In C₄ plants, the first stable product of photosynthesis is a 4-carbon compound, oxaloacetate. This is then rapidly converted to malate or aspartate, which are transported to bundle sheath cells. In these cells, the 4-carbon compound is decarboxylated, releasing CO₂ which is then fixed by Rubisco in the Calvin cycle, ultimately producing PGA. Thus, while PGA is indeed the first product of the Calvin cycle, the first stable product of C₄ photosynthesis is malate.

🔑Key Points :
-In C4 plants, the first stable product of CO2 fixation is Oxalo acetic acid
-Plants use carbon dioxide from the atmosphere to synthesize sugar through the process of photosynthesis.
-Carbon dioxide fixation is the first major step in the Calvin cycle. 
-The Calvin cycle is a biosynthetic pathway that occurs in all photosynthetic plants (C3 as well as C4 plants).

• 🛑Additional Information:
-Carbon dioxide fixation, called carboxylation, is the first major step in the Calvin cycle.

✏️The carbon dioxide assimilation in plants is of two types:
-In some plants, the first product of carbon dioxide fixation is 3-phosphoglyceric acid (PGA) or C3 acid. These plants are called C3 plants.
-In some plants, the first product of carbon dioxide fixation is oxaloacetic acid (OAA) or C4 acid. These plants are called C4 plants.
-Maize or sorghum is an example of a C4 plant.