The type of pollution that gets increased during the daytime and in the presence of $$O_3$$ is:

Photochemical smog (also called oxidising smog or Los Angeles smog) is formed during the daytime in the presence of sunlight. It involves the photochemical reaction of nitrogen oxides ($$NO_x$$) and volatile organic compounds (VOCs) in the presence of sunlight, producing ozone ($$O_3$$), peroxyacetyl nitrate (PAN), and other secondary pollutants.

The presence of $$O_3$$ is a characteristic feature of photochemical or oxidising smog. Since ozone and other oxidants are the primary components, this type of smog is called oxidising smog. It increases during the daytime because sunlight drives the photochemical reactions that produce these oxidising pollutants.

Reducing smog (London smog), by contrast, occurs in cooler, humid conditions and contains $$SO_2$$ and soot particles. It is not associated with ozone formation.

Therefore, the correct answer is Option (2): Oxidising smog.