The grass species which is predominantly found in western Rajasthan is:

Correct option is C

Lasiurus sindicus, commonly known as Sewan grass, is a dominant and native grass species of the arid and semi-arid regions, especially western Rajasthan.
It is well adapted to extremely dry conditions, thrives on sandy soils, and plays a crucial role in the desert ecosystem by preventing soil erosion and serving as excellent natural pasture for livestock.
Its drought tolerance and palatability make it the most significant forage species in the Thar Desert region.
(a) Napier grass – Commonly used as a cultivated fodder grass in irrigated areas; not native to arid Rajasthan.
(b) Panicum pedicellatum – Found in semi-arid zones, but not predominant in western Rajasthan.
(c) Lasiurus sindicus – Native, drought-tolerant, thrives in sandy soils of western Rajasthan – correct.
(d) Cynodon dactylon – Known as Bermuda grass; widely distributed but not dominant in the desert ecosystem.