With respect to water pollution, the correct statements are:
- Water gets polluted by sewage treatment plants.
- Water pollution is caused due to discharge of dirty water from the house, industries, and agricultural fields in it.
- The color and smell of water remain the same.
- Polluted water is not fit for drinking.
1
All of them
2
1 and 3
3
2 and 4
4
1, 2 and 4