From Top to Bottom the Soil Horizons in Typical Soil

Question

From top to bottom the soil horizons in typical soil are:
A) B,O,A,C
B) C,A,B,O
C) O,A,B,C
D) A,B,C,D
E) D,C,A,O

Accepted Answer

The correct sequence from top to bottom is O (organic matter), A (topsoil), B (subsoil), and C (parent material), which matches option C.