The correct answer is: A. Alluvial soil
Alluvial soil is a type of soil that is formed from the deposition of sediments by water. It is typically found in river valleys and floodplains. Alluvial soils are typically very fertile and are well-suited for agriculture.
Laterite soil is a type of soil that is formed from the weathering of rocks in tropical climates. It is typically red or yellow in color and is very poor in nutrients. Laterite soils are often used for grazing or for growing crops that are tolerant of poor soil conditions.
Sandy soil is a type of soil that is composed of mostly sand particles. It is typically loose and well-drained, but it can be low in nutrients. Sandy soils are often used for growing crops that are tolerant of drought conditions.
Loamy soil is a type of soil that is composed of a mixture of sand, silt, and clay particles. It is typically well-drained and fertile. Loamy soils are often used for growing a variety of crops.
In the Pat zone of Jharkhand, the soil is predominantly alluvial soil. This is because the Pat zone is located in the Ganges River basin, which is a major source of alluvial sediments. Alluvial soils are typically very fertile and are well-suited for agriculture.