The correct option is 1, 2, 3 and 4
Explanation
The Narmada is the largest west-flowing river of Peninsular India. Unlike most major peninsular rivers that flow eastwards into the Bay of Bengal, the Narmada flows westwards through a geological fault.
Statement-wise Analysis:
- Statement 1 is Correct: The Narmada originates on the western flank of the Amarkantak plateau in Madhya Pradesh at an elevation of approximately 1,057 meters.
- Statement 2 is Correct: The river flows in a rift valley formed due to faulting. It is situated between the Vindhyan range to the north and the Satpura range to the south.
- Statement 3 is Correct: Near Jabalpur, the river creates a deep gorge through magnesium limestone rocks known as the Marble Rocks. In this stretch, it forms the Dhuandhar waterfall (meaning "smoke cascade").
- Statement 4 is Correct: The Narmada does not form a delta due to the steep gradient and lack of sediment deposition in its lower course. Instead, it forms a 27 km long estuary before draining into the Arabian Sea south of Bharuch.
Key Takeaway:
The Narmada is a rift-valley river flanked by the Vindhyas and Satpuras, originating from Amarkantak. It is distinct for forming an estuary rather than a delta.