Which of the following is purification of water at large scale – a) Disinfection of well b) Rapid sand filterc) Slow sand filterd) Household purification
Which of the following is purification of water at large scale – a) Disinfection of well b) Rapid sand filterc) Slow sand filterd) Household purification
💡 Explanation
Which of the following is purification of water at large scale - a) Disinfection of well b) Rapid sand filterc) Slow sand filterd) Household purification