The ratio of 'organic carbon' to 'organic matter' in soil is

Answer: Option A

Organic matter of the soil consists of three primary parts including small plant residues and small living soil organisms, decomposing organic matter and stable organic matter.
Organic carbon is the measure of carbon content stored in the soil organic matter.
The ratio of 'organic carbon' to 'organic matter' in soil is 1.0 : 1.7