Particles of dust, cement, and carbon particles in smoke may cause bronchitis.

• Particles of lead oxide in automobile exhaust can cause brain damage in children.
• Particles of mercury cause a disease called Minamata; which can lead to brain damage, mental retardation, and paralysis.
• Sulphur dioxide causes respiratory problems or lung damage.

Bronchitis is a condition characterized by inflammation of the bronchial tubes, which carry air to and from the lungs. It can be caused by various factors, including particulates in the air. Among the options provided, the particulates that can cause bronchitis are dust and carbon particles.

- Dust and Carbon Particles:
Dust and carbon particles are common air pollutants that can be inhaled and cause respiratory problems. When these particles are inhaled, they can irritate the bronchial tubes, leading to inflammation and the development of bronchitis. Dust particles can come from various sources such as construction sites, industrial activities, or even from natural sources like pollen or soil. Carbon particles, or soot, are produced from the incomplete combustion of fossil fuels. These particles are commonly found in urban areas with high levels of pollution.

- Other options:
a) Lead oxide: Lead oxide is a toxic compound that can have harmful effects on the body, but it is not a known cause of bronchitis. Lead exposure is more commonly associated with neurological and developmental issues.
c) Mercury: Like lead, mercury is a toxic substance that can have severe health effects. However, it is not typically associated with bronchitis.
d) Sulphur dioxide: Sulphur dioxide is a gas produced from the burning of fossil fuels, particularly in power plants and industrial processes. It is a known air pollutant and can irritate the respiratory system. While it can contribute to respiratory problems, it is not a specific cause of bronchitis.

In conclusion, among the options provided, dust and carbon particles are the particulates that can cause bronchitis. These particles can irritate the bronchial tubes and lead to inflammation and the development of bronchitis. It is important to minimize exposure to these particulates by maintaining clean indoor air and reducing exposure to outdoor pollution.