Which group of animals belong to the same phylum ?
(a) Earthworm , pinworm, tapeworm
(b) Prawn, scorpion, locust
(c) Sponge, sea anemone , starfish
(d) Malarial parasite, Amoeba , mosquito

Options

A. Earthworm , pinworm, tapeworm
B. Prawn, scorpion, locust
C. Sponge, sea anemone , starfish
D. Malarial parasit, Amoeba , mosquito

Answer

To determine which group of animals belongs to the same phylum, we will analyze each option provided in the question:

### Step-by-Step Solution:

1. **Option (a): Earthworm, Pinworm, Tapeworm**
- **Earthworm**: This organism belongs to the phylum **Annelida**.
- **Pinworm**: This organism belongs to the phylum **Nematoda** (roundworms).
- **Tapeworm**: This organism belongs to the phylum **Platyhelminthes** (flatworms).
- **Conclusion**: Since all three organisms belong to different phyla, this option is not correct.

2. **Option (b): Prawn, Scorpion, Locust**
- **Prawn**: This organism belongs to the phylum **Arthropoda** (specifically, the class Crustacea).
- **Scorpion**: This organism also belongs to the phylum **Arthropoda** (specifically, the class Arachnida).
- **Locust**: This organism belongs to the phylum **Arthropoda** (specifically, the class Insecta).
- **Conclusion**: All three organisms belong to the same phylum, **Arthropoda**, making this option correct.

3. **Option (c): Sponge, Sea Anemone, Starfish**
- **Sponge**: This organism belongs to the phylum **Porifera**.
- **Sea Anemone**: This organism belongs to the phylum **Cnidaria**.
- **Starfish**: This organism belongs to the phylum **Echinodermata**.
- **Conclusion**: Since all three organisms belong to different phyla, this option is not correct.

4. **Option (d): Malarial Parasite, Amoeba, Mosquito**
- **Malarial Parasite (Plasmodium)**: This organism belongs to the phylum **Apicomplexa**.
- **Amoeba**: This organism belongs to the phylum **Protozoa**.
- **Mosquito**: This organism belongs to the phylum **Arthropoda**.
- **Conclusion**: Since all three organisms belong to different phyla, this option is not correct.

### Final Answer:
The group of animals that belong to the same phylum is **(b) Prawn, Scorpion, Locust**.

---