Question

5. Put the correct sequence in water treatment.
1. Grit and sand removal tank
2. Bar screens
3. Clarified water
4. Activated sludge
O A. 2, 3, 4, 1
O B. 2, 1,4,3
O C..3, 1, 4,2
O D. 4, 2, 1,3​

Answer 1

Answer:

B .2,1,4,3 this is your answer