Given below are two statements, an Assertion (A) and a Reason (R). Choose the correct answer.
Assertion (A):Water logging and soil salinity are problems that arise when irrigation is done without proper drainage of water.
Reason (R):Improper drainage leads to water logging; salt gets deposited as a thin crust on the soil surface and collects at the roots of plants, and this salinity affects plant growth.
ABoth (A) and (R) are true and (R) is the correct explanation of (A) ✓ Correct
BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
C(A) is true, but (R) is false
D(A) is false, but (R) is true
Correct answer: (A) Both (A) and (R) are true and (R) is the correct explanation of (A)
Explanation
Both statements are true and the reason correctly explains the assertion about waterlogging and salinity.
The assertion is sound: waterlogging and soil salinity appear when irrigation lacks proper drainage.
The reason is sound: poor drainage waterlogs the soil and leaves a salt crust that gathers at plant roots and stunts growth.
Because the missing drainage causes both the standing water and the salt build-up, it fully accounts for the two problems named.
Rising groundwater carries dissolved salts upward, which stay behind as water evaporates.
Lining canals and building drains help prevent these twin problems.
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