The concentration of dissolved Oxygen in water for growth of fish should be more than X ppm and Biochemical Oxygen Demand in clean water should be less than Y ppm. X and Y in ppm are, respectively.

Options

A. `((X,Y),(6,5))`
B. `((X,Y),(6,12))`
C. `((X,Y),(4,8))`
D. `((X,Y),(4,15))`

Answer

To solve the question regarding the concentration of dissolved oxygen (DO) and biochemical oxygen demand (BOD) in water, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Dissolved Oxygen (DO):**
- Dissolved oxygen is essential for the survival of aquatic life, especially fish.
- The minimum concentration of dissolved oxygen required for the growth of fish is generally accepted to be more than 5 ppm.

2. **Identifying the Value of X:**
- Since the concentration of dissolved oxygen for fish growth should be more than 5 ppm, we can denote this value as X.
- Therefore, we can conclude that \( X = 5 \) ppm (the minimum requirement) but since it should be more than 5, we can take \( X = 6 \) ppm for the sake of this question.

3. **Understanding Biochemical Oxygen Demand (BOD):**
- BOD measures the amount of oxygen that microorganisms will consume while decomposing organic matter in water.
- In clean water, the BOD should be less than 5 ppm to indicate that the water is not polluted.

4. **Identifying the Value of Y:**
- Since the BOD in clean water should be less than 5 ppm, we can denote this value as Y.
- Thus, we conclude that \( Y < 5 \) ppm. For the purpose of this question, we can take \( Y = 5 \) ppm as the upper limit.

5. **Final Values:**
- Therefore, we have \( X = 6 \) ppm and \( Y = 5 \) ppm.

### Conclusion:
The values of X and Y are:
- \( X = 6 \) ppm (Dissolved Oxygen)
- \( Y = 5 \) ppm (Biochemical Oxygen Demand)