Which one of the following groups of three animals each are correctly matched with their characteristic morphological feature ?

Options

A. `{:("Animals","Morphological feature"),("Centipede , prawn , Sea urchin","Joined appendages"):}`
B. `{:("Animals","Morphological feature"),("Scorpion, Spider,Cockroach","Ventral solid central nervous system"):}`
C. `{:("Animals","Morphological feature"),("Cockroach, Locust, Taenia","Metameric segementation"):}`
D. `{:("Animals","Morphological feature"),("Liver fluke , sea anemone , Sea cucumber","Bilateral symmetry"):}`

Answer

To solve the question, we need to analyze the groups of animals provided and their corresponding morphological features to determine which group is correctly matched.

### Step-by-Step Solution:

1. **Identify the Groups and Features**:
- Group 1: Centipedes, Prawns, Sea Urchins - Feature: Joint Appendages
- Group 2: Scorpion, Spider, Cockroach - Feature: Ventral Solid Central Nervous System
- Group 3: Cockroach, Locust, Tinea (Tapeworm) - Feature: Metameric Segmentation
- Group 4: Liver Fluke, Sea Anemone, Sea Cucumber - Feature: Bilateral Symmetry

2. **Analyze Group 1**:
- Centipedes and Prawns have joint appendages (they belong to the phylum Arthropoda).
- Sea Urchins do not have joint appendages; they belong to the phylum Echinodermata.
- **Conclusion**: This group is incorrectly matched.

3. **Analyze Group 2**:
- Scorpions, Spiders, and Cockroaches all belong to the phylum Arthropoda.
- They have a ventral solid central nervous system.
- **Conclusion**: This group is correctly matched.

4. **Analyze Group 3**:
- Cockroaches and Locusts have external segmentation (they are arthropods).
- Tinea (Tapeworm) does not exhibit true metameric segmentation; it has a segmented body but lacks true segmentation.
- **Conclusion**: This group is incorrectly matched.

5. **Analyze Group 4**:
- Liver Fluke has bilateral symmetry.
- Sea Anemone has radial symmetry.
- Sea Cucumber has bilateral symmetry in larval form but radial symmetry in adult form.
- **Conclusion**: This group is incorrectly matched.

6. **Final Conclusion**:
- The only correctly matched group is **Group 2: Scorpion, Spider, Cockroach** with the feature of **Ventral Solid Central Nervous System**.

### Answer:
The correct answer is **Group 2: Scorpion, Spider, Cockroach**.