Assertion (A): Smog is more common in cities with high traffic density.
Reasoning (R): The exhaust emissions from vehicles contain a large amount of nitrogen oxides and hydrocarbons that contribute to the formation of smog.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
The assertion and reasoning are both correct, and the reasoning provides the correct explanation for the assertion.
Smog is a type of air pollution that occurs in urban areas with high traffic density, industrial activity, and other sources of emissions. Smog is a combination of smoke and fog, hence the name. It is primarily composed of ground-level ozone, particulate matter, nitrogen oxides, and volatile organic compounds.
The exhaust emissions from vehicles, particularly those with internal combustion engines, contain a large amount of nitrogen oxides and hydrocarbons. When these emissions are released into the atmosphere, they can react with sunlight and other compounds to form ground-level ozone and particulate matter, which are major components of smog. Therefore, cities with high traffic density are more likely to have higher levels of smog.
Hence, both assertion (A) and reasoning (R) are true, and R is the correct explanation of A.