Select the correct statement.

Options

A. Arthropoda is the largest class of kingdom Animalia
B. Closed type of circulatory system is found in annelids.
C. Nephron belongs to class Reptilia
D. Psittacula is the Natioal bird of India

Answer

To solve the question, we need to evaluate each statement provided and determine which one is correct.

### Step-by-Step Solution:

1. **Evaluate Statement 1**: "Arthropoda is the largest class of kingdom Animalia."
- **Analysis**: Arthropoda is actually the largest phylum in the kingdom Animalia, not a class. Therefore, this statement is incorrect.

2. **Evaluate Statement 2**: "Closed type of circulatory system is found in annelids."
- **Analysis**: Annelids, such as earthworms, do indeed have a closed circulatory system where blood is contained within blood vessels. This statement is correct.

3. **Evaluate Statement 3**: "Nephron belongs to class Reptilia."
- **Analysis**: Nephrons are the functional units of kidneys found in mammals, not reptiles. Reptiles have metanephric kidneys. Thus, this statement is incorrect.

4. **Evaluate Statement 4**: "Sitakula is the national bird of India."
- **Analysis**: The national bird of India is the peacock. Sitakula refers to a type of parrot, which is not the national bird. Therefore, this statement is also incorrect.

### Conclusion:
The only correct statement among the options provided is:
- **Statement 2**: "Closed type of circulatory system is found in annelids."