The correct option is
B Smoke and fog
The correct option is option B
The explanation for the correct option:
- Smoke and fog combine to form smog.
- As a result, smog is derived from the two terms.
- Smog is a type of air pollution caused by the photocatalytic process of sunlight with nitrous oxides and hydrocarbons released into the air, particularly from automobile emissions.
Final answer: Smog is a combination of smoke and fog.