Correct statement about smog is [JEE Main 2023, 29 Jan (Shift 1)]

\({\mathrm{NO}}_{2}\) is present in classical smog

Both \({\mathrm{NO}}_{2}\) and \({\mathrm{SO}}_{2}\) are present in classical smog

Photochemical smog has high concentration of oxidizing agents

Classical smog also has high concentration of oxidizing agents