B. 50
C. 75(Correct)
D. 100
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about_______________?
B. 50
C. 75(Correct)
D. 100
B. 50
C. 75(Correct)
D. 100
B. 50
C. 75(Correct)
D. 100
B. 50
C. 75(Correct)
D. 100