Which of the following is a correct match ?

Options

A. a) Cray fish - Elasmobranch
B. b) Cuttle fish - Osteichthyes
C. c) Jelly fish - Echinodermata
D. d) Silver fish - Arthropoda

Answer

To determine which of the following is a correct match, we need to analyze each option provided in the question.

1. **Crayfish**:
- Classification: Crayfish belong to the phylum **Arthropoda**.
- Given match: Elasmobranch (which refers to a subclass of fish, including sharks and rays).
- Conclusion: This is an **incorrect match**.

2. **Cuttlefish**:
- Classification: Cuttlefish belong to the class **Cephalopoda**, which is part of the phylum **Mollusca**.
- Given match: Osteichthyes (which refers to bony fish).
- Conclusion: This is also an **incorrect match**.

3. **Jellyfish**:
- Classification: Jellyfish belong to the phylum **Cnidaria**.
- Given match: Echinodermata (which includes starfish and sea urchins).
- Conclusion: This is an **incorrect match**.

4. **Silverfish**:
- Classification: Silverfish belong to the class **Insecta**, which is part of the phylum **Arthropoda**.
- Given match: Arthropoda.
- Conclusion: This is a **correct match**.

After evaluating all the options, we find that the only correct match is **Silverfish - Arthropoda**.

### Final Answer:
The correct match is **Silverfish - Arthropoda**.