The wavelength of ultraviolet radiation that causes lethal effects on human cells when exposed is in the range of

Correct option is A

The correct answer is: A) 100–280 nm This is the UV-C range, which is highly energetic and most damaging to living cells. It can cause DNA mutations and cell death.
Information Booster: • UV-C is mostly absorbed by the ozone layer. • UV-B (280–315 nm) also causes skin damage.