The correct option is Marusthali.
Explanation
The Great Indian Desert, situated to the northwest of the Aravalli hills, is a distinct physiographic region characterized by arid conditions, low vegetation cover, and undulating sandy topography.
Option Analysis:
- Marusthali Marusthali: Correct. The Great Indian Desert is known as Marusthali. The term is derived from Sanskrit, meaning the "land of the dead," reflecting the region's harsh arid climate, low rainfall (below 150 mm per year), and scarcity of life. It primarily consists of sand dunes (barchans) and rocky outcrops.
- Bangar Bangar: Incorrect. Bangar refers to the older alluvial plains found in the Northern Plains of India. These deposits lie above the floodplains of rivers and often contain calcareous deposits known as 'Kankar'.
- Khadar Khadar: Incorrect. Khadar refers to the newer, younger alluvial deposits found in the low-lying floodplains of rivers. This soil is renewed almost every year and is highly fertile.
- Doab Doab: Incorrect. Doab is a term used to describe the tract of land lying between two converging rivers (e.g., the Ganga-Yamuna Doab). It is a feature associated with river systems, not desert physiography.
Key Takeaway: Marusthali is the specific geographical nomenclature for the Great Indian Desert, distinguishing its arid, sandy landscape from the alluvial formations of the Northern Plains.