A gas contains two types of suspended particles having average sizes of 2 μm and 50 μm. Amongst the options given below, the most suitable pollution control strategy for removal of these particle is

• A. setting chamber followed by bag filter
• B. ​electrostatic precipitator followed by venturi scrubber
• C. electrostatic precipitator followed by cyclonic separator
• D. bag filter followed by electrostatic precipitator