How can photochemical smog be controlled?

Which of these reactions is not a part of the breakdown of ozone in the stratosphere?

$A.$ Ammonium salts produce haze in the atmosphere.
$B.$ Ozone is produced when atmospheric oxygen reacts with chlorine radicals.
$C.$ Polychlorinated biphenyls act as cleansing solvents.
$D.$ 'Blue baby' syndrome occurs due to the presence of excess nitrate ions in water.
Choose the correct answer from the options given below:

Explain in short: Effect of ozone depletion on environment.

How is non-degradable industrial solid waste disposed of?

Consider the following.
Assertion $(A)$: $CO$ is poisonous to living beings.
Reason $(R)$: $CO$ binds to haemoglobin forming carboxyhaemoglobin,which is less stable than oxygen-haemoglobin complex.
Correct answer is