Which of the following is not an ionising radiation?

Relative Biological Effectiveness $(RBE)$ is usually considered as the damage caused by ..........

The most adverse effect of radioactive pollutant is

Wastes may be sealed in concrete-filled drums and discharged to a depth of about $500 \;m$. This specific statement is true for

$X$ is a highly potent pollutant and should be buried at a depth of $Y$ meters below the Earth's surface.

$I.$ 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 $B$.