A soil which has pH 4 dSm-1 at 25°C is called

Answer: Option A

A soil with pH < 8.5, ESP < 15 and EC > 4 dSm-1 at 25°C is called Saline Soil.
Saline soil is referred to as one that inhibits the growth of most crops because of the higher concentration of neutral soluble salts in it.
ESP is Exchangeable Sodium Percentage, used to determine soil sodicity.
EC is the electrical conductivity, used to measure the salinity of the soil.