Assertion (A) : River system can continue to cut down its

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Assertion (A) : River system can continue to cut down its valleys at approximately the same rate as uplift and so maintains its general pattern and direction.
Reason (R) : In case of an antecedent drainage system, the river is said to have originated before a period of uplift and folding of land as a result of earth movement.
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1. Both (A) and (R) are individually true and (R) is the correct explanation of (A)
2. Both (A) and (R) are individually true but (R) is not the correct explanation of (A)
3. (A) is true but (R) is false
4. (A) is false but (R) is true

Correct Option: B

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