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In mesophyll cells of C₄ plants, the oxaloacetic acid formed is converted into other 4-carbon compounds such as

(a) malic acid or aspartic acid Correct
(b) pyruvic acid or lactic acid Your answer
(c) citric acid or isocitric acid Your answer
(d) glycolate or glycine Your answer

Your answer: Correct answer: (a)

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Explanation

Why (a) is correct

In C₄ mesophyll cells, OAA is converted to other 4-carbon compounds such as malic acid or aspartic acid, which move to the bundle sheath.

Why the other options are wrong

(b) · your answer Pyruvic acid is 3-carbon, and lactic acid is not formed here.
(c) · your answer Citric acid and isocitric acid are 6-carbon compounds of the Krebs cycle.
(d) · your answer Glycolate and glycine are photorespiratory compounds.

NCERT point: C₄ acids carry CO₂ into the bundle sheath.

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