Match the Following Options to Its Correct Definition

Match the following options to its correct definition.
-NOx

A) chemicals like benzene, toluene, butane, and propane
B) hydrocarbon compounds that contain chlorine and fluourine; were widely used in refrigerators are coolants
C) family of nitrogen and oxygen compounds that are greenhouse gases
D) a combination of sulfur dioxide or nitrogen oxide and water
E) a combination of smoke and fog