Which of the following is NOT a common hazardous gas produced by combustion?

The correct answer highlights that nitrogen dioxide is typically not classified as a common hazardous gas produced by combustion compared to the others listed. While nitrogen dioxide can result from combustion processes, especially in vehicle emissions and fossil fuel burning, it is primarily considered a pollutant that contributes to air quality issues and does not commonly arise from combustion in the same immediate and hazardous manner as the other substances mentioned.

Carbon monoxide is often produced during incomplete combustion of carbon-containing fuels and is known for its toxicity as it can bind to hemoglobin in the blood. Carbon dioxide, although less toxic, is a byproduct of combustion and contributes to greenhouse gas emissions. Cyanide, particularly hydrogen cyanide, can also be generated in some combustion reactions, especially those involving certain plastics and materials.

Identifying nitrogen dioxide in this context indicates a distinction in both its prevalence as a byproduct and its classification relative to other hazardous gases typically highlighted in fire safety and inspection scenarios.