Given below are the two statements one labelled as Assertion (AS) and other Labelled as Reason (R):Assertion (AS): The work of wind as an agent of gradation is not as wide spread as that of water.Reason (R): It is effective only in the desert regions of the world where rainfall is scanty and soil particles are loose.In the context of the above two statements which one of the following is correct:

• A. Both (AS) and (R) are true and(R) is the correct explanation of(AS).
• B. Both (AS) and (R) are true but(R) is not the correct explanation of (AS).
• C. (AS) is true but (R) is false.
• D. (AS) is false but (R) is true.