Hint:We have to remember that the Mahi Sagar is a tributary in western India. It surges in Madhya Pradesh and, after streaming by way of the Vagad province of Rajasthan, crosses The threshold of Gujarat and trickles into the Arabian Sea.
We must remember that the Mahi Bajaj Sagar Dam is the second biggest and the lengthiest embankment in Rajasthan. It is labelled after Jamnalal Bajaj. It is the massive multipurpose scheme for the tribal region of Rajasthan.
Mahi Bajaj Sagar Dam is an embankment across the Mahi river. It is positioned 16 kilometres from Banswara city in Banswara region Rajasthan, India. The barrier was designed between 1972 and 1983 with the motive of hydroelectric energy output and water supply. It shelters different crocodiles and turtles. There are numerous islands within the catchment region of the embankment, so Banswara also popularly known as "City of Hundred Islands". The barricade is effortlessly accessible by the street. The barrier has an established potential of 140 MW.
The Mahi brook seeping into the Gulf of Khambhat is on the brink of cessation due to pollution and saltiness. Fisherfolk and non-governmental organisations of Vadodara and Gujarat, accuse the formation of bunds on the Mahi by the Vadodara Municipal Corporation for the prevalent condition. The bunds built to accumulate water have discontinued the external movement of the stream.
Hence, the correct answer is option (C).
Note: Accordingly, the river is confronting an intrusion of salted water from the ocean as there is no surface discharge to thrust the seawater back during a low surge. The groundwater in several regions might become saline due to this. In the preceding year 2016, around 800 turtles have perished because of the surplus salinity of the water. Presently, the Mahi brook is in a very awful state.