Which of the following are common freshwater fishes ?

Options

A. Mackerel and rohu
B. Rohu, common carp and Catla
C. Hilsa and sardine
D. None of these

Answer

To determine which of the options provided contains common freshwater fishes, we can analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the Options**: We have four options to evaluate:
- Option 1: Mackerel and Rohu
- Option 2: Rohu, Common Carp, and Catla
- Option 3: Hilsa and Sardine
- Option 4: None of these

2. **Classify the Fishes**:
- **Mackerel**: This is a marine fish, commonly found in saltwater.
- **Rohu**: This is a freshwater fish, commonly found in rivers and ponds in South Asia.
- **Common Carp**: This is also a freshwater fish, widely cultivated in aquaculture.
- **Catla**: This is another freshwater fish, popular in Indian aquaculture.
- **Hilsa**: This is a marine fish, primarily found in the sea.
- **Sardine**: This is also a marine fish, typically found in saltwater.

3. **Evaluate Each Option**:
- **Option 1**: Contains Mackerel (marine) and Rohu (freshwater) - Not valid as it includes a marine fish.
- **Option 2**: Contains Rohu (freshwater), Common Carp (freshwater), and Catla (freshwater) - Valid as all are freshwater fishes.
- **Option 3**: Contains Hilsa (marine) and Sardine (marine) - Not valid as both are marine fishes.
- **Option 4**: States "None of these" - Not valid since Option 2 is correct.

4. **Conclusion**: The correct answer is **Option 2: Rohu, Common Carp, and Catla**, as all these are common freshwater fishes.

### Final Answer:
**Option 2: Rohu, Common Carp, and Catla** are common freshwater fishes.