Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.
(a) Sludge is scraped out and skimmer removes the floating grease.
(b) Water is made to settle in a large tank with a slope in the middle.
(c) Large objects like plastic bags are removed by passing wastewater through bar screens.
(d) Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
(e) Wastewater enters a grit and sand removal tank.

Explanation

To arrange the processes involved in a wastewater treatment plant in their correct sequence, we can follow these steps:

1. **Identify the first step**: The first step in the wastewater treatment process is to remove large objects from the wastewater. This is done by passing the wastewater through bar screens.
- **Correct Sequence**: (c) Large objects like plastic bags are removed by passing wastewater through bar screens.

2. **Identify the second step**: After the large objects are removed, the wastewater enters a grit and sand removal tank where heavier particles like sand and grit can settle down.
- **Correct Sequence**: (e) Wastewater enters a grit and sand removal tank.

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