Thickness of ozone in column of air from ground to top of atmosphere is measured in terms of
Dobson unit
(DU)
Centimeters
More than one is correct
As discussed in Ozone Depletion in the Stratosphere -
Dobson units (DU) -
The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Dobson units (DU).
Hence, the correct option is (d).