Most commonly found soil type

Answer: Option A

The most commonly found soil type is Alluvial soil which is available all over our country along with the river sides.
Alluvial soil is loose clay, silt, sand or gravel that has been deposited by running water in a stream bed. This soil is also called alluvial deposits, and these are highly fertile.
Black soil is confined to central plateau regions as these are derivatives of trap lava.
Laterite soil is commonly found in Southern states mostly.