Oxides of nitrogen
Carbon monoxide
Polycyclic hydrocarbons
Lead
Answer is Wrong!
Answer is Right!
The correct answer is: C. Polycyclic hydrocarbons
Polycyclic hydrocarbons are a group of chemicals that are formed when organic matter is burned. They are found in the exhaust of gasoline-powered vehicles, as well as in cigarette smoke and other sources of air pollution.
Polycyclic hydrocarbons are known to
cause cancer in animals, and there is strong evidence that they also cause cancer in humans. They are thought to cause cancer by damaging DNA, which can lead to the uncontrolled growth of cells.The other options are also constituents of automobile exhaust, but they are not known to cause cancer.
- Oxides of nitrogen are a group of gases that are formed when gasoline is burned. They can cause respiratory problems, heart disease, and other health problems.
- Carbon monoxide is a gas that is formed when gasoline is burned incompletely. It is a colorless, odorless gas that can be deadly if inhaled in high concentrations.
- Lead is a heavy metal that is used in some gasoline additives. It can cause brain damage, kidney damage, and other health problems.