A) UV radiation reaching the earth
B) Cataract
C) Increase in skin cancer
D) All of the above
Correct Answer: D
Solution :
UV radiation of wavelengths shorter than UV-B, are almost completely absorbed by earth's atmosphere, given that the ozone layer is intact. But, UV-B dam- ages DNA and mutation may occur. It causes aging of skin, damage to skin cells and various types of skin cancers. In human eye, cornea absorbs UV-B radiation and a high dose of UV-B causes inflammation of cornea called snow-blindness cataract, etc. Such exposure may permanently damage the cornea.
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