Correct Option: A

Kamarupa, also called Pragjyotisha, was the first historical kingdom in Assam that existed between 350 and 1140 CE i.e. for almost 800 years. Though the historical kingdom disappeared by 12th century to be replaced by smaller political entities, the notion of Kamarupa persisted and ancient and medieval chroniclers continued to call this region by this name. The name of this kingdom survives in Kamarupa, a present-day district in Assam.