The correct answer is: Alluvial soil.
Alluvial soil is the most common type of soil found in Manipur. It is a rich, fertile soil that is deposited by rivers and streams. Alluvial soil is ideal for growing crops such as rice, wheat, and sugarcane.
Red soil is a type of soil that is rich in iron oxide. It is found in tropical and subtropical regions. Red soil is not as fertile as alluvial soil, but it is still suitable for growing crops such as rice, maize, and soybeans.
Black soil is a type of soil that is rich in organic matter. It is found in semi-arid and sub-humid regions. Black soil is very fertile and is ideal for growing crops such as cotton, wheat, and millet.
Lateritic soil is a type of soil that is rich in iron and aluminum oxides. It is found in tropical and subtropical regions. Lateritic soil is not as fertile as alluvial soil, red soil, or black soil, but it is still suitable for growing crops such as coffee, tea, and rubber.