A. Hardness of water
B. Industrial pollution
C. Sewage pollution
D. Presence of chlorine in water
Correct Answer: Sewage pollution ✔
Last Updated: May 23, 2024
A. Hardness of water
B. Industrial pollution
C. Sewage pollution
D. Presence of chlorine in water
Correct Answer: Sewage pollution ✔
Last Updated: May 23, 2024