Which of the following have porous body and are diploblastic?

Options

A. Aurelia and Obelia
B. Adamsia and Euplectella
C. Leucosolenia and Spongilla
D. Sycon and Hydra

Explanation

To solve the question "Which of the following have porous body and are diploblastic?", we will follow these steps:

### Step 1: Understand Key Terms
- **Porous Body**: This refers to organisms that have a body structure with numerous pores. This characteristic is primarily found in sponges.
- **Diploblastic**: This means that the organism develops from two germ layers: the ectoderm and the endoderm.

### Step 2: Identify Relevant Phyla
- The phylum that includes organisms with a porous body is **Porifera** (sponges).
- Organisms that are diploblastic typically belong to phyla such as **Cnidaria** (e.g., jellyfish, corals).

### Step 3: Analyze the Options
1. **Aurelia and Obelia**: Both belong to the phylum Cnidaria, which are diploblastic but do not have a porous body.
2. **Adamcia and Euplactella**: Euplactella is a sponge (Porifera) and has a porous body, but Adamcia is not a sponge, making this option incorrect.
3. **Leukosilenia and Spondyla**: Both belong to the phylum Porifera, which means they have a porous body and are diploblastic. This option is likely correct.
4. **Cyclone and Hydra**: Cyclone belongs to Porifera, but Hydra is a Cnidarian, which makes this option incorrect.

### Step 4: Conclusion
After analyzing all the options, the correct answer is **Leukosilenia and Spondyla** as they both have a porous body and are diploblastic.

### Final Answer
The organisms that have a porous body and are diploblastic are **Leukosilenia and Spondyla**.

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