Biplab Deb was sworn in as chief minister of Tripura on Friday in the presence of Prime Minister Narendra Modi. Jishnu Dev Burman took oath as the deputy chief minister.The swearing-in marks the BJP taking over the reins of the state for the first time. The BJP alliance in the northeastern state won 43 out of the 60 assembly seats, ending nearly 25 years of the Left rule in Tripura.