The correct answer is: c) Telangana.
Andhra Pradesh shares its longest border with Telangana. The two states share a border of over 900 kilometers. The border runs from the north, where it is defined by the Godavari River, to the south, where it is defined by the Krishna River. The border between Andhra Pradesh and Telangana is a relatively new one, having been created in 2014 when Andhra Pradesh was divided into two states.
The border between Andhra Pradesh and Telangana is a significant one, as it divides two major Telugu-speaking states. The border has been the subject of some controversy, as there have been disputes over the location of the border and the sharing of resources. However, the border has also been a source of cooperation, as the two states have worked together to develop infrastructure and promote trade.
The other options are incorrect for the following reasons:
- a) Tamil Nadu is incorrect because Andhra Pradesh shares a border of only about 600 kilometers with Tamil Nadu.
- b) Odisha is incorrect because Andhra Pradesh shares a border of only about 300 kilometers with Odisha.
- d) Maharashtra is incorrect because Andhra Pradesh shares a border of only about 100 kilometers with Maharashtra.