Read the following match about phylum and it's one character :
I. Annelida : First- time true coelom (schizocoelom) present in them.
II. Arthropoda : Only metamerically segmented animals with hemocoel.
III. Echinodermata : Have exoskeleton of calcareous ossicles and spines .
IV. Hemichordata : Small worm-like marine animals with the notochord.
How many from the above is/ are the correct

Options

A. Two
B. Three
C. Four
D. One

Answer

To solve the question, we need to analyze each statement regarding the phyla and their respective characteristics:

1. **Annelida**: "First-time true coelom (schizocoelom) present in them."
- This statement is **correct**. Annelids are indeed the first group of animals to exhibit a true coelom, which is a body cavity completely lined by mesoderm.

2. **Arthropoda**: "Only metamerically segmented animals with hemocoel."
- This statement is **incorrect**. While Arthropoda do have metameric segmentation, they are not the only phylum with this characteristic. Annelids also exhibit metameric segmentation. Additionally, the term "hemocoel" refers to a body cavity filled with blood, which is characteristic of many invertebrates, not just Arthropoda.

3. **Echinodermata**: "Have exoskeleton of calcareous ossicles and spines."
- This statement is **incorrect**. Echinoderms possess an endoskeleton made of calcareous ossicles and spines, not an exoskeleton. The endoskeleton is located inside their body.

4. **Hemichordata**: "Small worm-like marine animals with the notochord."
- This statement is **incorrect**. Hemichordates do not possess a true notochord. They have a structure that resembles a notochord, but it is not the same and does not fulfill the criteria to be classified as a notochord.

Now, let's summarize the correctness of each statement:
- Annelida: Correct
- Arthropoda: Incorrect
- Echinodermata: Incorrect
- Hemichordata: Incorrect

Thus, only **one** statement is correct.

### Final Answer:
**1 statement is correct.**