The correct answer is only three pairs. Explanation & Key Takeaways: River Narmada • The Narmada originates on the western flank of the Amarkantak plateau. • Flowing in a rift valley between the Satpura in the south and the Vindhyan range in the north, it forms a picturesque gorge in marble rocks and the Dhuandhar waterfall near Jabalpur. • It meets the Arabian Sea south of Bharuch, forming a broad 27 km long estuary. • The Sardar Sarovar Project has been constructed on this river. Hence pair 1 is incorrect. River Tapi • The Tapi rises in the Satpura ranges, in the Betul district of Madhya Pradesh. • It also flows in a rift valley parallel to the Narmada but it is much shorter in length. • Its basin covers parts of Madhya Pradesh, Gujarat and Maharashtra. • Hathnur Dam of Upper Tapi Project (Maharashtra) River Mahanadi • The Mahanadi rises near Sihawa in the Raipur district of Chhattisgarh and runs through Odisha to discharge its water into the Bay of Bengal. • Its drainage basin is shared by Maharashtra, Chhattisgarh, Jharkhand, and Odisha. • It forms a complex delta along with Brahmani and Baitarani Rivers. • The Hirakud dam on the river has reduced the flood intensity of the river. Hence pair 2 is correct. River Krishna • The Krishna is the second largest east-flowing Peninsular River which rises near Mahabaleshwar in Sahyadri. • The important tributaries are Konya, Ghataprabha, Malaprabha, Bhima, Tungabhadra, musi and muneru. • The Konya, Tungabhadra and Nagarjunsagar are the important dams across the Krishna river system. Hence pair 3 is correct. River Kaveri • The Kaveri rises in the Brahmagri range of the Western Ghats and it reaches the Bay of Bengal south of Cuddalore in Tamil Nadu. • The upper catchment area receives rainfall during the southwest monsoon season (summer) and the lower part during the northeast monsoon season (winter), the river carries water throughout the year with comparatively less fluctuation than the other Peninsular Rivers. • Its important tributaries are the Kabini, the Bhavani and the Amravati. • Mettur dam is in river kaveri. Hence pair 4 is correct. Related Concepts: