The range of rate of filtration of pressure filters is

• A. 1000 to 2000 liters per hour per sq. m of filter area
• B. 2000 to 4000 liters per hour per sq. m of filter area
• C. 4000 to 5000 liters per hour per sq. m of filter area
• D. 6000 to 15000 liters per hour per sq. m of filter area