Cockroach belong's to phylum :-

Options

A. Annelida
B. Arthropoda
C. Platyhelminthes
D. Porifera

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the phylum to which the cockroach belongs. The scientific name of the cockroach is *Periplaneta americana*.

2. **Understand the Classification**: Organisms are classified into different taxonomic ranks. The phylum is one of these ranks, which groups organisms based on shared characteristics.

3. **Examine the Characteristics of Cockroaches**:
- Cockroaches have jointed appendages.
- They possess a chitinous exoskeleton.
- Their body is divided into three main parts: head, thorax, and abdomen.

4. **Determine the Correct Phylum**:
- The characteristics of cockroaches align with those of the phylum Arthropoda, which includes insects and crustaceans. The term "Arthropoda" means "jointed feet," reflecting the jointed appendages of these organisms.
- Other options provided:
- **Annelida**: This phylum includes segmented worms like earthworms.
- **Platyhelminthes**: This includes flatworms.
- **Porifera**: This phylum consists of sponges, which are lower invertebrates.

5. **Conclude the Answer**: Based on the characteristics and classification, the cockroach belongs to the phylum **Arthropoda**.

**Final Answer**: Cockroach belongs to the phylum **Arthropoda**.

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