Assertion :Dark acidification occurs in CAM plants. Reason: Organic acids are decarboxylated during night.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Crassulacean Metabolism or CAM photosynthesis pathway is an adaptation for efficient photosynthesis in plants of arid regions. Dark acidification occurs in CAM plants(acidification occurs during the night). During night, organic acid - malic acid is synthesized utilizing CO $_{2}$ (dark CO2 fixation) which then accumulates in the vacuole and may account for the major amount of acids.
So, the correct option is 'Assertion is correct but Reason is incorrect'.

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