Calculate the regenerant flow required for the softener system with the given below data.Calcium Load: 85 ppm as CaCO3Capacity: 37 Kg/m3Correction factor: 0.9Flow rate: 135 m3/hrOperation hours: 20 hrs

• A. 25 m3/hr
• B. 28 m3/hr
• C. 12 m3/hr
• D. 21 m3/hr