Which one of the following regions was designated as the 'Western Dry Region' within the agro-climatic regional planning framework of the Planning Commission of India?

The Planning Commission of India divided the country into 15 major agro-climatic zones. Zone 14 is defined as the 'Western Dry Region', which predominantly encompasses the arid and semi-arid tracts of western Rajasthan characterized by low rainfall and high climatic variability.