The Rann Utsav festival is celebrated in:

Kutch
Banaskantha
Sabarkantha
Junagadh

The Rann Utsav is a festival celebrated in the Kutch district of Gujarat, India. It is a 10-day festival that takes place in the Rann of Kutch, a vast salt marsh that is home to a variety of wildlife. The festival celebrates the culture and traditions of the people of Kutch, and includes a variety of events such as music, dance, and traditional food.

The Rann Utsav is a popular tourist destination, and attracts visitors from all over the world. It is a great opportunity to experience the unique culture and traditions of Kutch, and to enjoy the beauty of the Rann of Kutch.

The other options are incorrect because they are not the districts in which the Rann Utsav is celebrated. Banaskantha, Sabarkantha, and Junagadh are all districts in Gujarat, but they are not located in the Rann of Kutch.