The option "2 only" is correct because historical regional identifications must align with geographical and cultural contexts. Durgara is correctly associated with Jammu, reflecting the historical significance of the region during medieval times. In contrast, Champaka, though present in Central India, does not have strong historical connections as a specific medieval state in that area, while Kuluta refers to a historic area in Himachal Pradesh rather than Malabar in Kerala. This distinction emphasizes the importance of accurate historical geography in understanding India's medieval polity, which is crucial for UPSC Prelims.