Lead element is also an air pollutant. Thus option B is correct.
What are the air pollutants?
Any physical, chemical, or biological changes in air due to contamination by incorporation of harmful gases, dust, and smoke causes air pollution.
The imbalance in the gaseous concentration in air lead to global warming.
There are two major types of air pollutants such as Primary and Secondary Pollutants,
Primary pollutants cause air pollution directly and secondary pollutants are generated by intermingling of primary pollutants.
Lead, Fly Ash, Metallic Oxides, Nanoparticles, Carbon monoxide (CO), Carbon dioxide (CO2), Chlorofluorocarbons (CFCs), Ozone (O3), Nitrogen oxide (NOx), Sulphur dioxide (SO2) are some examples of air pollutants.
A hazardous heavy metal called Lead can cause serious damage to different physiological system of the human body like nervous system damage, Digestive system, affect kidney.
It can also cause cumulative food poisoning. Hence, Lead was banned to add fuels. Thus option B is correct.
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