3. The permissible hardness of water for public supplies is
| Useful Links From This Website |
| Notifications, Admit Cards, Results, Universities |
| Books, Exam Pattern, Mock Tests, Study Materials, Syllabus, Test Papers |
A. 25 mg/litre
B. 75 mg/litre
C. 115 mg/litre
D. 10 mg/litre
