Correct option is D
1. (a) Carbon monoxide – (iv) Combustion products:
· Carbon monoxide is a product of incomplete combustion of fossil fuels such as coal, gas, and petrol. It is one of the most dangerous air pollutants in indoor and outdoor environments.
2. (b) Benzene – (i) Volatile Organic Chemical (VOC):
· Benzene is a toxic VOC found in tobacco smoke, vehicle exhaust, and industrial emissions. It is carcinogenic and evaporates quickly into the air.
3. (c) Asbestos – (ii) Respirable particulate:
· Asbestos consists of tiny fibers that become airborne and are inhaled into lungs, making it a respirable particulate. It is known to cause lung diseases including asbestosis and mesothelioma.
4. (d) Fungi – (v) Biologics and bioaerosol:
· Fungal spores are biological pollutants dispersed in air, classified under bioaerosols. They can cause allergies, asthma, and respiratory infections.
Information Booster:
· Combustion products (e.g., CO, NOx, SOx) are major indoor/outdoor pollutants and health hazards.
· Volatile Organic Chemicals (VOCs) like benzene contribute to ground-level ozone and smog formation.
· Respirable particulates like asbestos or PM2.5 deeply penetrate lung tissues, causing chronic respiratory problems.
· Bioaerosols include fungi, bacteria, viruses and allergens that affect indoor air quality.