The first carbon dioxide acceptor in C₄-plants is

Solution(By Examveda Team)

The first carbon dioxide acceptor in C₄ plants is Phosphoenol-pyruvate.
C₄ carbon fixation is one of three known photosynthetic processes of carbon fixation in plants.
CO₂ is initially fixed in the mesophyll cells by the enzyme PEP carboxylase which reacts the three-carbon phosphoenolpyruvate (PEP) with CO₂ to form the four-carbon oxaloacetic acid (OAA). The resulting pyruvate (PYR), together with about half of the phosphoglycerate (PGA) produced by RuBisCO, diffuses back to the mesophyll.