Correct Option
The correct option is Ladakh and Western Rajasthan
Explanation
Rainfall distribution in India is classified into various categories based on annual precipitation levels. Regions receiving less th of annual rainfall are categorized as areas of Inadequate or Scanty Rainfall. These climatic conditions directly influence the natural vegetation, typically resulting in Tropical Thorn Forests or Desert vegetation.
Option Analysis
- Jharkhand and Bihar: These regions fall under the category of moderate to high rainfall (typically 100-200 cm), supporting Tropical Deciduous Forests. They do not fall under the inadequate rainfall category.
- Ladakh and Western Rajasthan:
- Western Rajasthan: Characterized as a hot desert, it receives very low rainfall due to the parallel orientation of the Aravalli Range to the Arabian Sea branch of the monsoon and its location far from the Bay of Bengal branch.
- Ladakh: Characterized as a cold desert, it lies in the rain-shadow zone of the Himalayas (Great Himalayas block the monsoon winds).
- Eastern Madhya Pradesh: This region receives moderate rainfall (approx. 100-150 cm), supporting Moist Deciduous vegetation.
- Coastal Tamil Nadu: This region receives significant rainfall (averaging 90-100 cm or more), primarily from the North-East Monsoon (Retreating Monsoon) during October-December.
Key Takeaway: The Inadequate Rainfall zone (< 50 cm) in India primarily covers Western Rajasthan, Northern Gujarat, Ladakh, and the rain-shadow regions of the Western Ghats (parts of Rayalaseema and Karnataka plateau).