MCQ
In the polluted water, the values of :
- A$\text{C.O.D}$. slightly higher than $\text{B.O.D}$.
- ✓$\text{C.O.D}$. much higher than $\text{B.O.D}$.
- C$\text{B.O.D}$. slightly higher than $\text{C.O.D}$.
- D$\text{B.O.D}$. much higher than $\text{C.O.D}$.