TS EAMCET 9-Sep-2020 Shift 2 Solved Paper

(c) Photochemical smog is a type of smog, produced when ultraviolet light from the sun reacts with nitrogen oxides organic compounds or O3 in the atmosphere. It is visible as brown haze and more prominent during morning and afternoon, especially in densely populated warm cities.
Hence, (c) is the correct answer (i.e. SO2 is not the component of photochemical smog ).