Consider the following statements : Assertion [A]: The Rivers of West Coast of India do not form delta. Reason [R]: They How through short courses on relatively harder rocks. [UP-PCS 2014] Choose the correct answer using the codes given below:

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