Platyhelminthes are

Options

A. Diploblastic, radially symmetrical and coelomate
B. Diploblastic, radially symmetrical and acoelomate
C. Triploblastic, bilaterally symmetrical and acoelomate
D. Triploblastic, bilaterally symmetrical and pseudocoelomate

Answer

### Step-by-Step Solution:

1. **Understanding Platyhelminthes**:
- Platyhelminthes, commonly known as flatworms, include both parasitic and non-parasitic species. They are characterized by their flat body shape.

2. **Analyzing the Options**:
- The question provides several options regarding the classification of Platyhelminthes. We need to evaluate each option based on their characteristics.

3. **Evaluating Option 1**:
- The first option states that Platyhelminthes are "diploblastic, radially symmetrical, and coelomate."
- This option is incorrect because Platyhelminthes are not coelomate; they are acoelomate (lack a body cavity).

4. **Evaluating Option 2**:
- The second option also states "diploblastic, radially symmetrical, and coelomate."
- Similar to the first option, this is incorrect for the same reasons.

5. **Evaluating Option 3**:
- The third option claims that Platyhelminthes are "triploblastic, bilaterally symmetrical, and coelomate."
- This option is partially correct. Platyhelminthes are indeed triploblastic and bilaterally symmetrical, but they are acoelomate, not coelomate.

6. **Evaluating Option 4**:
- The last option states "triploblastic, bilaterally symmetrical, and pseudosilomate."
- This option is incorrect because Platyhelminthes are acoelomate, not pseudosilomate.

7. **Conclusion**:
- The correct classification of Platyhelminthes is that they are **triploblastic** and **bilaterally symmetrical**, but they are **acoelomate**. Therefore, none of the options provided are entirely correct. However, option 3 is the closest, as it correctly identifies them as triploblastic and bilaterally symmetrical.