The radioactive waste leakage incident occurred at which of the following places?

Which of the following methods is the most suitable for the disposal of nuclear waste?

The Chernobyl incident is concerned with:

Which of the following statement$(s)$ is/are correct?
$(i)$ Nuclear energy is a non-polluting way of generating electricity.
$(ii)$ Radioactive waste leakage incidents occurred at Three Mile Island and Chernobyl.
$(iii)$ Prolonged exposure to radioactive waste can cause cancer.
$(iv)$ Radioactive waste is recyclable.
$(v)$ High doses of radiation are lethal.

$I.$ Radiation from nuclear waste is $A$ at a very high rate.
$II.$ At low doses,radiation causes $B$.
Complete the given statement by choosing the appropriate option for $A$ and $B$.

Which type of waste is highly lethal in large quantities?