Which of the following is properly matched ?

Options

A. Arthropoda-Insecta-Spider
B. Mollusca-Cephalopoda-Unio
C. Echinodermata-Asteroidea-Starfish
D. platyhelminthes-Trematoda - Planaria

Answer

To determine which of the following options is properly matched, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Option 1: Arthropoda includes the class Insecta with the organism Spider.**
- **Analysis:** This statement is incorrect. Spiders belong to the class Arachnida, not Insecta. Therefore, this option is not properly matched.

2. **Option 2: Mollusca includes the class Cephalopodia with the organism Juno.**
- **Analysis:** This statement is also incorrect. The organism Juno belongs to the class Bivalvia, not Cephalopodia. Hence, this option is not properly matched.

3. **Option 3: Echinodermata includes the class Asteroidea with the organism Starfish.**
- **Analysis:** This statement is correct. Starfish, scientifically known as Asterias, belongs to the class Asteroidea within the phylum Echinodermata. This option is properly matched.

4. **Option 4: Platyhelminthes includes the class Trematoda with the organism Planaria.**
- **Analysis:** This statement is incorrect. Planaria belongs to the class Turbellaria, not Trematoda. Therefore, this option is not properly matched.

### Conclusion:
The only properly matched option is **Option 3: Echinodermata includes the class Asteroidea with the organism Starfish.**

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