Assertion: The rivers, after descending from the mountains deposit pebbles in a narrow belt of about 8 to 16 km in width lying parallel to the slopes of the Shivaliks.

Reason: It is known as Terai.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are true and but (R) is not the correct explanation of (A).

(A) is correct but (R) is wrong.

(A) is wrong but (R) is correct.

answer is C.

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Detailed Solution

The three major river systems in India, the Indus, the Ganga, and the Brahmaputra, along with their tributaries, have formed the Northern Plains. These rivers have fertile deposits that form alluvial soil. These plains also have various relief features and are divided into four regions. The rivers deposit rocks and pebbles in a narrow belt of about 8 to 16 km in width, parallel to the slopes of the Shiwaliks, also known as Bhabar. Terai is the swampy and marshy region to the south of the belt formed by the re-emergence of streams and rivers creating this wet region. Hence, the assertion is correct, but the reason is wrong.

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