The term ‘regur’ refers to

deltaic alluvial soils
lateral soils
black cotton soils
red and yellow soils

The correct answer is: C. black cotton soils

Black cotton soils are a type of soil that is found in the Deccan Plateau of India. They are also known as regur soils or black earths. These soils are rich in organic matter and have a high water-holding capacity. They are also very fertile and are used to grow a variety of crops, including cotton, rice, and sugarcane.

Deltaic alluvial soils are a type of soil that is found in deltas. They are formed when rivers deposit sediment as they flow into the ocean. These soils are typically rich in nutrients and are good for growing crops.

Lateral soils are a type of soil that is found on the sides of hills. They are formed when soil is eroded from the top of the hill and deposited on the sides. These soils are typically not as fertile as other types of soil.

Red and yellow soils are a type of soil that is found in tropical and subtropical regions. They are formed when rocks are weathered by the sun and rain. These soils are typically not as fertile as other types of soil.