The primary precursor of photochemical smog that can be metabolised by plants such as Juniparus and Pyrus, is

Given below are two Statements :

Statement I : Classical smog occurs in cool humid climate. It is a reducing mixture of smoke, fog and sulphur dioxide.

Statement II : Photochemical smog has components, ozone, nitric oxide, acrolein, formaldehyde, PAN etc.

In the light of the above statements, choose the most appropriate answer from the options given below.

Formation of photochemical smog involves the following reaction in which $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$ are respectively.

(i) ${\mathrm{NO}}_2\stackrel{\mathrm{hu}}{⟶}\mathrm{A}+\mathrm{B}$

(ii) $\mathrm{B}+{\mathrm{O}}_2\to \mathrm{C}$

(iii) $\mathrm{A}+\mathrm{C}\to {\mathrm{NO}}_2+{\mathrm{O}}_2$

Choose the correct answer from the options given below:

Some reactions of ${\mathrm{NO}}_2$ relevant to photochemical smog formation are

Identify $\mathrm{A},\mathrm{B},\mathrm{X}$ and $\mathrm{Y}$

Which of the following species is not involved in the formation of photochemical smog?