Explanation:

Rohtas district is one of the thirty-eight districts of Bihar state, India. It came into existence when Shahabad District was bifurcated into Bhojpur & Rohtas in 1972. Administrative headquarter of the district is Sasaram.

The Rohtas district is a part of Patna Division, and it has an area of 3850 km² (square kilometres), a population of 2,959,918 (2011 census), and a population density of 763 persons per km². Languages spoken here are Bhojpuri, Hindi and English.

The literacy rate in Rohtas district was 73.37% as of 2011. The literacy rate was higher for men than for women: 82.88% of men but only 62.97% of women in the district could read and write. Literacy also was higher in urban areas than rural ones. The highest literacy rate in Rohtas district could be found in the town and sub-district of Dehri - 77.70% of the district's total population, and 81.2% of the population of the town proper, was literate. The lowest literacy rate was in the entirely rural district of Nauhatta, where 63.07% of the population could read and write.