The non-biodegradable waste formed in fertilizer industries is

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R:$
Assertion $A:$ Polluted water may have a value of $BOD$ of the order of $17 \, ppm$.
Reason $R:$ $BOD$ is a measure of oxygen required to oxidise both the biodegradable and non-biodegradable organic material in water.
In the light of the above statements,choose the most appropriate answer from the options given below.

What is biodegradable and non-biodegradable waste?

Give two names of herbicides.

Which principle of green chemistry highlights that the protection of a selective group is not advantageous?

Polar stratospheric clouds facilitate the formation of .... .