The correct answer is (a) PM10.
Electrostatic precipitation is a method of air pollution control that uses electrostatic forces to remove particulate matter from the air. It is most widely used to control PM10, which is a type of particulate matter that is 10 micrometers or less in diameter. PM10 can be harmful to human health, as it can be inhaled into the lungs and cause respiratory problems.
Electrostatic precipitation works by passing a stream of air through a series of charged plates. The particles in the air become charged and are attracted to the plates. The plates are then discharged, and the particles are collected in a hopper.
Electrostatic precipitation is a very effective method of air pollution control. It can remove up to 99% of PM10 from the air. It is also a relatively energy-efficient method of air pollution control.
The other options are incorrect because they are not the most common pollutants that are controlled by electrostatic precipitation. Sulphur dioxide and oxides of nitrogen are pollutants that are typically controlled by other methods, such as flue gas desulfurization and selective catalytic reduction.