The correct answer is: d) 79°E to 83°E.
Bihar is a state in eastern India. It is bordered by Nepal to the north, Uttar Pradesh to the west, Jharkhand to the south, and West Bengal to the east. The state has a total area of 94,163 square kilometers (36,357 sq mi).
The longitudinal extent of Bihar is approximately 79°E to 83°E. The state’s capital and largest city is Patna.
Option a) is incorrect because it is too wide. The longitudinal extent of Bihar is not from 80°E to 85°E.
Option b) is incorrect because it is too narrow. The longitudinal extent of Bihar is not from 83°E to 88°E.
Option c) is incorrect because it is too wide. The longitudinal extent of Bihar is not from 88°E to 92°E.