Q. The flouride content in the drinking water should not exceed (Solved)
1. 200 mg/litre
2. 150 mg/litre
3. 100 mg/litre50 mg/litre
4. 1 mg/litre
5. 50 mg/litre
- d. 1 mg/litre
1. 200 mg/litre
2. 150 mg/litre
3. 100 mg/litre50 mg/litre
4. 1 mg/litre
5. 50 mg/litre