Which is not correctly matched?

Options

A. Annelida- Enterocoelomate
B. Arthropoda - Schizocoelomate
C. Platyhelminthes - Acoelomate
D. Nemathelminthes - Pseudocoelomate

Answer

To determine which option is not correctly matched regarding the phylum and the type of coelom (body cavity), we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Types of Coelom:**
- **Acoelomate:** Animals with no coelom (e.g., flatworms).
- **Pseudocoelomate:** Animals with a false coelom (e.g., nematodes).
- **Coelomate (Eucelomate):** Animals with a true coelom, which can be further classified into:
- **Schizocoelomate:** Coelom forms from the splitting of mesoderm (e.g., annelids, arthropods).
- **Enterocoelomate:** Coelom forms from the wall of the embryonic gut (e.g., echinoderms, chordates).

2. **Analyze Each Option:**
- **Option A:** Annelida - Schizocoelomate
- This is correctly matched as annelids are indeed schizocoelomates.
- **Option B:** Arthropoda - Schizocoelomate
- This is also correctly matched as arthropods are schizocoelomates.
- **Option C:** Platyhelminthes - Acoelomate
- This is correctly matched as flatworms are acoelomates.
- **Option D:** Nematoda - Pseudocoelomate
- This is correctly matched as nematodes are pseudocoelomates.

3. **Identify the Incorrect Match:**
- Since all options appear to be correctly matched, we need to focus on the question's requirement of identifying the "not correctly matched" option. The video transcript indicates that the answer is option A, which is incorrect as it is indeed correctly matched.

4. **Conclusion:**
- The answer is option A, which is incorrectly stated in the video as the wrong match. All other options are correctly matched.

### Final Answer:
The option that is not correctly matched is **A: Annelida - Schizocoelomate** (as stated in the video, but it is actually correct).