Body cylindrical, divided into ring like segments, with coelom and digestive system are characteristics of Phylum

Options

A. Coelenterata
B. Arthropoda
C. Annelida
D. Mollusca

Explanation

To determine the phylum characterized by a cylindrical body divided into ring-like segments, with a coelom and a digestive system, we can analyze the options provided:

1. **Cylindrata**:
- Characteristics: Aquatic, mostly marine, diploblastic (two germ layers), tissue level of organization, and exist in two forms: polyp and medusa (e.g., Hydra).
- Conclusion: This option is incorrect as it does not have a segmented body.

2. **Arthropoda**:
- Characteristics: Jointed appendages, organ level of organization, bilateral symmetry, and triploblastic (three germ layers).
- Conclusion: This option is incorrect as it does not have a segmented body divided into ring-like structures.

3. **Annelida**:
- Characteristics: Can be aquatic or terrestrial, organ system level of organization, bilateral symmetry, triploblastic, and a body that is segmented into ring-like structures (called annuli).
- Conclusion: This option fits the description perfectly, as annelids have a cylindrical body divided into segments, possess a coelom, and have a complete digestive system.

4. **Mollusca**:
- Characteristics: Generally have unsegmented bodies.
- Conclusion: This option is incorrect as it does not have a segmented body.

Based on the analysis, the correct answer is **Phylum Annelida**.

### Steps Summary:
1. Analyze the characteristics of each phylum provided in the options.
2. Eliminate options that do not match the description of having a cylindrical body divided into ring-like segments.
3. Identify the phylum that fits all the characteristics mentioned in the question.
4. Conclude that the correct answer is Phylum Annelida.