Correct option is C
Among the given rivers, Narmada does not form a delta. Instead, it forms an estuary as it flows into the Arabian Sea.
Rivers that form deltas:
Mahanadi: Forms a delta before entering the Bay of Bengal.
Krishna: Forms a delta in its lower course before entering the Bay of Bengal.
Godavari: Also forms a delta before merging into the Bay of Bengal.
The Narmada River flows through a rift valley between the Vindhya and Satpura ranges and, due to its unique geological features, forms an estuary rather than a delta.
