Consider the following statements:Assertion (A) : The surface winds spiral inwards upon the centre of the cyclone.Reason (R) :Air descends in the centre of the cyclone.In the context of above two statements, Which one of the following is correct ?

• 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