The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?

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The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?

A. Bag filter
B. Electrostatic precipitator
C. Cyclone separator
D. Wet scrubber