The salt concentration (measured as salinity in parts per thousand), is less than ......% in inland waters.

Options

A. 5
B. 20
C. 50
D. 75

Answer

A

Explanation

Salinity is the measure of all the salts dissolved in water. Salinity is usually measured in parts per thousand(ppt or %).The average ocean salinity is 35ppt and the average river water salinity is 0.5ppt or less.