Explanation:

=> NITI Aayog released the Delta Ranking of Champions of Change. In this, four districts of Bihar have been ranked among the five best improving districts of the country in the field of education.

=> In this delta ranking, NITI Aayog has declared these districts as champions of change, ranking Muzaffarpur, Aurangabad, Banka and Sheikhpura districts of Bihar at the second, third, fourth and fifth positions respectively in the country after Dumka in Jharkhand.

=> NITI Aayog has declared five districts Dumka, Muzaffarpur, Aurangabad, Banka and Sheikhpura as aspirational districts for October 2021 respectively.