Assertion (A): River Kalinadi is an east-flowing river in the southern part of India. Reason (R): The Deccan Plateau is higher along its western edge and gently slopes towards the Bay of Bengal in the east.

1. (a)Both A and R are true and R is the correct explanation of A
2. (b)Both A and R are true but R is not the correct explanation of A
3. (c)A is true but R is false
4. (d)A is false but R is true