Solum is made up of

A. C-horizon

B. A-horizon

C. A and B-horizon

D. None of the above

Answer: Option D

Solution(By Examveda Team)

The solum in soil science consists of the surface and subsoil layers that have undergone the same soil-forming conditions. The base of the solum is a relatively unweathered parent material. It is a moisture and temperature sensor of the soil.
In terms of horizons, a solum consists of A, E and B horizons altogether not alone any thus the above options are not correct.