Given below are two statements, one labelled as Assertion A and the other as Reason R. In the light of the above statements, choose the correct answer from the options given below.
Assertion (A):A high concentration of nitric oxide in soils makes it uninhabitable for plants.
Reason (R):NO combines with soil water and forms nitrous and nitric acid, which increases the soil acidity.
ABoth A and R are correct and R is the correct explanation of A ✓ Correct
BBoth A and R are correct but R is not the correct explanation of A
CA is correct but R is not correct
DA is not correct but R is correct
Correct answer: (A) Both A and R are correct and R is the correct explanation of A
Explanation
A high concentration of nitric oxide in soil can make it unfit for plants, so Assertion A is correct.
The buildup harms roots and disturbs nutrient uptake.
The Reason is correct, as nitric oxide combines with soil water to form nitrous and nitric acid.
These acids raise soil acidity, which directly explains why plants struggle, so the Reason explains the Assertion.
Acidified soil locks up nutrients and mobilises toxic metals like aluminium.
Nitrogen oxide inputs often come from vehicle exhaust and fertiliser use.
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