Mark the incorrect statement about ozone.

Ozone gas is continuously formed by the action of UV rays on molecular oxygen, and also degraded into molecular oxygen in the stratosphere.

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).

Although thinning of ozone is occurring widely in the stratosphere, its depletion is particularly marked over the Antarctic region.

UV radiation of wavelengths longer than UV-B, are almost completely absorbed by Earth’s atmosphere, given that the ozone layer is intact.