The correct answer is: a) 24°N to 27°N.
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 latitudinal extent of Bihar is approximately 24°N to 27°N. The state’s capital and largest city is Patna.
Option b) 20°N to 24°N is incorrect because it does not include the northernmost point of Bihar, which is located at 24°N.
Option c) 27°N to 30°N is incorrect because it does not include the southernmost point of Bihar, which is located at 23°N.
Option d) 19°N to 23°N is incorrect because it does not include the westernmost point of Bihar, which is located at 24°N.