RAS question
What is a 'Rann' in Rajasthan's geography?
Correct answer: (D) A salt flat/marsh.
In Rajasthan geography, a Rann is a saline marshland or salt flat, not a sand dune, oasis, or rocky plateau.
Explanation
A Rann is best understood as a saline lowland: a salt flat or marshy salt desert. That is why the Rajasthan usage is linked with the western border belt, including the extension of the Rann of Kachchh towards Barmer and Jaisalmer. Britannica describes the Rann of Kachchh as a large area of saline mudflats and explains the seasonal pattern: during the monsoon it becomes waterlogged, while in the dry season the water evaporates and leaves a white salty bed. This matches option D because the defining feature is salinity and flat marshy terrain, not the loose sand, groundwater-fed greenery, or rocky relief suggested by the other options.
Why the other options are wrong
- (A) A sand dune is a wind-shaped accumulation of sand, locally treated under dhrian or barkhan-type desert forms, whereas a Rann is defined by saline mudflat or marshy conditions.
- (B) An oasis is a water-supported fertile patch in a dry region, while a Rann is a saline flat or marsh where salt and seasonal waterlogging are central.
- (C) A rocky plateau refers to an elevated hard-rock surface or pathar, which is geomorphologically different from a low saline flat or marsh.
Concept
This tests Rajasthan physical geography, especially desert landforms and saline features of the western border region. It recurs in RAS because small local terms such as Rann, dune and plateau often decide one-mark factual questions.