Identify the false statements among the following.
(i) They possess water vascular system
(ii) They possess parapodia
(iii) They show bilateral symmetry only during larval stage
(iv) They possess incomplete digestive tract

Options

A. (i) and (iii)
B. (i) and (iv)
C. (iii) and (iv)
D. (i) and (iii)

Answer

To identify the false statements among the given options regarding Annelida, we can analyze each statement one by one:

1. **Statement (i): They possess a water vascular system.**
- Annelids do not have a water vascular system; this system is characteristic of echinoderms (like starfish and sea urchins). Therefore, this statement is **false**.

2. **Statement (ii): They possess parapodia.**
- Parapodia are fleshy appendages found in many annelids, particularly in polychaetes, which aid in locomotion and respiration. Thus, this statement is **true**.

3. **Statement (iii): They show bilateral symmetry only during larval stage.**
- Annelids exhibit bilateral symmetry throughout their life cycle, including in the adult stage. Therefore, this statement is **false**.

4. **Statement (iv): They possess an incomplete digestive tract.**
- Annelids have a complete digestive tract, meaning they have a distinct mouth and anus. Therefore, this statement is also **false**.

Based on the analysis:
- The false statements are (i), (iii), and (iv).

Thus, the correct identification of false statements is:
- **False statements:** (i) They possess a water vascular system, (iii) They show bilateral symmetry only during larval stage, (iv) They possess an incomplete digestive tract.

### Summary of False Statements:
1. They possess a water vascular system.
2. They show bilateral symmetry only during larval stage.
3. They possess an incomplete digestive tract.