Correct Option
The correct option isKrishna and Tungabhadra
Explanation
A 'Doab' (derived from Persian do meaning two and ab meaning water) refers to the fertile tract of land lying between two converging rivers. The Raichur Doab is a triangular region located in the Deccan Plateau, historically significant for its agricultural fertility and mineral resources.
Detailed Analysis
- Godavari and Krishna is Incorrect: The region between the Godavari and Krishna rivers is known as the Godavari-Krishna delta or the Vengi region. While historically significant under the Satavahanas and Eastern Chalukyas, it is distinct from the Raichur Doab.
- Krishna and Tungabhadra is Correct: The Raichur Doab is situated between the Krishna River to the north and the Tungabhadra River to the south. The Tungabhadra is a major tributary that joins the Krishna near Alampur (Jogulamba Gadwal district). Due to its fertile "black cotton soil" and strategic location, this region was a major bone of contention between various Deccan powers throughout history, most notably between the Vijayanagara Empire and the Bahmani Sultanate, and earlier dynasties like the Satavahanas and Chalukyas.
- Tungabhadra and Kaveri is Incorrect: The Tungabhadra and Kaveri rivers are geographically separated by the Mysore Plateau and other drainages; they do not form a contiguous doab.
- Narmada and Tapi is Incorrect: The Narmada and Tapi rivers flow westward through rift valleys in Central India (Madhya Pradesh and Maharashtra), located far to the north of the Raichur region.
Key Takeaway:
The Raichur Doab is the fertile land tract located between the Krishna and Tungabhadra rivers in the Deccan Plateau.