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. Code

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