Which one of the following matching pairs is wrong?

Options

A. Shell fish - Pisces
B. Silver fish-Arthropoda
C. Cuttle fish - Mollusca
D. Starfish - Echinodermata

Answer

To determine which matching pair is incorrect, we will analyze each option provided in the question step by step.

### Step 1: Analyze Option 1 - Shellfish
- **Definition**: Shellfish are aquatic invertebrates that include species such as mollusks and crustaceans.
- **Matching**: The option states that shellfish are matched with "by" (which seems to be incomplete in the context).
- **Conclusion**: Based on the definition, shellfish are correctly categorized as aquatic invertebrates, so this option appears to be correct.

### Step 2: Analyze Option 2 - Silverfish
- **Definition**: Silverfish are small, wingless insects belonging to the phylum Arthropoda.
- **Matching**: The option states that silverfish are matched with "by" (again, seems incomplete).
- **Conclusion**: Since silverfish are indeed classified under Arthropoda, this option is also correct.

### Step 3: Analyze Option 3 - Cuttlefish
- **Definition**: Cuttlefish are marine animals that belong to the phylum Mollusca.
- **Matching**: The option states that cuttlefish are matched with mollusk.
- **Conclusion**: This is a correct pairing as cuttlefish are indeed mollusks.

### Step 4: Analyze Option 4 - Starfish
- **Definition**: Starfish, also known as sea stars, are echinoderms and belong to the phylum Echinodermata.
- **Matching**: The option states that starfish are matched with "by" (again, seems incomplete).
- **Conclusion**: This is a correct pairing as starfish are classified under Echinodermata.

### Final Conclusion
After analyzing all the options, it appears that all pairs are correctly matched based on the definitions provided. However, since the question asks for the incorrect pair, it seems there may be an error in the options provided or in the interpretation of the question. Based on the analysis, none of the pairs seem to be wrong.