Which of the following pairs is correctly matched?

Answer: Option B

Red soil is a type of soil that develops in warm, temperate and humid climates and comprises around 13% of the earth's soil. it is clayey in texture and rich in Iron oxide.
Alkali soil is clay soil with high pH, greater than 8.5, a poor soil structure and a low infiltration capacity.
Black soil is rich in lime, iron, magnesia, potash and alumina. The colour of the soil ranges from deep black to grey.
Laterite is both soil and rock type rich in iron and aluminum and is commonly considered to have formed in hot and wet tropical areas. The pH of this soil is less than 7 and is acidic.