An environmental disaster is caused by the depletion of the ozone layer. Which disease is NOT caused by exposure to ultraviolet (UV) rays?

Teratoma is not caused by ultraviolet exposure, unlike the skin conditions listed.

It is a germ-cell tumour made of several tissue types, arising independent of sunlight.

Melanoma is a serious skin cancer strongly linked to ultraviolet radiation.

Erythema is the reddening of skin, a sunburn response to ultraviolet rays.

Carcinoma includes skin cancers driven by ultraviolet damage.

A thinning ozone layer lets more ultraviolet through, raising skin-cancer risk.