Arrange the general steps for the purification of water in a sequence.
(a) Filtration
(b) Chlorination
(c ) Sedimentation
(d) Addition of chemicals

Options

A. a c b d
B. c a b d
C. c d a b
D. a b d c

Explanation

To arrange the general steps for the purification of water in a sequence, we can follow these steps:

1. **Sedimentation**: This is the first step in the purification process. In this step, the water is allowed to stand undisturbed so that the suspended particles can settle at the bottom. This process helps in removing larger impurities from the water.

2. **Addition of Chemicals**: After sedimentation, chemicals may be added to the water. These chemicals help in coagulating the smaller, non-settling particles, making them larger and easier to remove in the next step.

3. **Filtration**: Once the chemicals have been added and the smaller particles have coagulated, the water is then filtered. Filtration involves passing the water through a filter medium that traps the remaining impurities, allowing clean water to pass through.

4. **Chlorination**: The final step is chlorination. In this step, chlorine is added to the water to disinfect it by killing any remaining bacteria or pathogens, ensuring that the water is safe for drinking.

So, the correct sequence of steps for the purification of water is:
(c) Sedimentation → (d) Addition of chemicals → (a) Filtration → (b) Chlorination