Quality parameters of rainwater from different sources are given below:
| Sources | pH | Turbidity |
TDS (mg/l) |
Chlorides (mg/l) |
Fluorides (mg/l) |
| A | 9.5 | 1 | 500 | 100 | 15 |
| B | 6.0 | 2 | 1000 | 200 | 1.5 |
| C | 8.0 | 5 | 1400 | 250 | 1.0 |
| D | 7.0 | 10 | 1600 | 300 | 0.1 |
Water drawn from which of the above sources can be tolerated for drinking without any treatment?
1
A and B
2
B and C
3
C only
4
D only