The largest salt desert in India is located in:

Kutch, Gujarat
Thar Desert, Rajasthan
Ladakh
Sunderbans

The largest salt desert in India is located in Kutch, Gujarat. It is called the Rann of Kutch. It is a vast, arid region with a unique ecosystem. The Rann of Kutch is home to a variety of wildlife, including flamingos, wild asses, and blackbuck. It is also a popular tourist destination.

The Thar Desert is the second largest desert in India. It is located in the northwestern part of the country, in the state of Rajasthan. The Thar Desert is a hot, dry desert with a sparse population. The main occupation of the people living in the Thar Desert is agriculture.

Ladakh is a region in the Indian state of Jammu and Kashmir. It is located in the Himalayas and is known for its high mountains, glaciers, and lakes. Ladakh is a sparsely populated region with a unique culture. The main occupation of the people living in Ladakh is agriculture.

The Sunderbans is a delta region in the Indian state of West Bengal. It is located at the mouth of the Ganges River and is known for its mangrove forests, tigers, and dolphins. The Sunderbans is a UNESCO World Heritage Site.

The correct answer is Kutch, Gujarat.