ANSWER: Arunachal Pradesh, Mizoram
Explanation:
Indian PM Shri Narendra Modi has greeted the people of Arunachal Pradesh and Mizoram on their statehood day i.e 20th February 2016. Arunachal Pradesh known as the Land of the Rising Sun has celebrated what is its 27th statehood day, having been formed in 1986-1987. Mizoram is the other NE state which celebrated statehood on this day as well.