Which of the following statements are true?
I. Molluscs possess cellular level of organisation.
II. Arthropods are true coelomates.
III. Platyhelminthes are pseudocoelomates.
IV. Ctenophores have bilateral symmetry.
Choose the correct option.

Options

A. I and II
B. Only II
C. I and IV
D. II, III, and IV

Answer

To determine which statements are true, we will evaluate each statement one by one based on our knowledge of the animal kingdom.

### Step-by-Step Solution:

1. **Evaluate Statement I: Molluscs possess cellular level of organization.**
- Molluscs are part of the phylum Mollusca, which is characterized by a complex body structure. They have an organ system level of organization, not just a cellular level. Therefore, this statement is **false**.

2. **Evaluate Statement II: Arthropods are true coelomates.**
- Arthropods belong to the phylum Arthropoda, which is the largest phylum in the animal kingdom. They possess a true coelom, which is a body cavity lined with mesoderm. Thus, this statement is **true**.

3. **Evaluate Statement III: Platyhelminthes are pseudocoelomates.**
- Platyhelminthes, or flatworms, are characterized as acoelomates, meaning they lack a body cavity entirely. They do not have a pseudocoelom, which is a body cavity not completely lined by mesoderm. Therefore, this statement is **false**.

4. **Evaluate Statement IV: Ctenophores have bilateral symmetry.**
- Ctenophores, also known as comb jellies, exhibit radial symmetry, not bilateral symmetry. They can be divided into similar halves along multiple planes. Hence, this statement is **false**.

### Conclusion:
After evaluating all statements, we find that only **Statement II is true**.

### Final Answer:
The correct option is **only Statement II**.

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