Which is not the constituent of photochemical smog?

A 3 carbon containing compound A which is a constituent of photochemical smog, is made to react with HCN, product is

PAN (Peroxyacety Nitrate) is an important constituent of photochemical smog is a

Which among the following is not a chemical component of photochemical smog?

Primary constituents of photochemical smog are

Primary constituents of photochemical smog are

Which are the primary constituents of photochemical smog ?

Which are the primary constituents of photochemical smog?

Which constituents of photochemical smog are responsible for eye-irritation-