Assertion (A) : The most important single agent of physical weathering is the freeze / that action of water in open spaces in rock.Reason (R) : Repetition is the key to understanding the force of frost shattering.Codes

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