The correct matching pairs Pragyotish with Assam (Kamarupa), Utkal with Orissa, Vanga with the Bengal region (East Bengal/Western Bangladesh), and Gauda with West Bengal. Pragyotish was the ancient name for the Kamarupa kingdom in Assam. Utkal is the historical name for the Odisha region. Vanga and Gauda were both ancient territorial divisions of Bengal.