The correct answer is: Laterite soil.
Laterite soil is a type of soil that is rich in iron and aluminum oxides. It is formed in tropical and subtropical regions with high rainfall and high temperatures. The soil is red or yellow in color and is very hard when dry. It is not very fertile and is not suitable for agriculture.
Alluvial soil is a type of soil that is formed by the deposition of sediments from rivers and streams. It is a very fertile soil and is suitable for agriculture.
Black soil is a type of soil that is formed in semi-arid regions. It is rich in organic matter and is very fertile.
Red soil is a type of soil that is formed in tropical and subtropical regions. It is rich in iron oxides and is not very fertile.
Arunachal Pradesh is a state in northeastern India. It is the largest state in India by area. The southern parts of Arunachal Pradesh have laterite soil.