The correct option is C Ozone, peroxyacetyl nitrate, aldehydes
Pollution is defined as addition of harmful components in the environment which alters the composition of an environment. The harmful component is known as pollutant. Photochemical smog can have an effect on the environment, on peoples health and even on various materials. The main visible effect is the brown haze that can be seen above many cities. The brown tinge is caused by very small liquid and solid particles scattering the light. Chemicals such as nitrogen oxides, ozone and peroxyacetyl nitrate (PAN) can have harmful effects on plants. These substances can reduce or even stop growth in plants by reducing photosynthesis. Thus, the correct answer is option C.