evidence: Arunachal has become full-fledged State on February 20, 1987. Till 1972, it was known as the North- East Frontier Agency (NEFA) . It gained the Union Territory status on January 20, 1972 and renamed as Arunachal Pradesh. [...] Arunachal Pradesh find mentioned in the literature of Kalika Purana and Mahabharta. This place is the Prabhu Mountains of Puranas. It was here the sage Parashuram atoned of his sin, sage Vyasa meditated, King Bhismaka founded his kingdom and Lord Krishna married his Consort Rukmini. [...] Arunachal Pradesh, situated in the north eastern part of India is nearly 84,000 sq km in area and has a long international border with Bhutan to the west (160km), Tibet to the north and north-east (1,080 km) and Myanmar to the east (440km). It stretches from snow-capped mountains in the north to the plains of Brahmaputra valley in the south. Arunachal is the largest state area wise in the north-eastern region, even larger than Assam which is the most populous.