Select the option with a correct representation of phylum of animal to the below - mentioned features :
I. The body is supported by a skeleton made up of spicules or spongin fibers with choanocytes line the spongocoel.
II. Specialized cells called flame cells help in osmoregulation and excretion.
III. The body bears eight rows of ciliated comb plates which helps in locomotion.
IV. The alimentary canal is complete with the well developed muscular pharynx.

Options

A. `{:(I,II,III,IV),("Echinodermata","Platyhelminthes","Cnidari","Arthopoda"):}`
B. `{:(I,II,III,IV),("Echinodermata","Nematoda","Ctenophora","Annelida"):}`
C. `{:(I,II,III,IV),("Porifera","Aschelminthes","Echinodermata","Platyhelminthes"):}`
D. `{:(I,II,III,IV),("Porifera","Platyhelminthes","Ctenophora","Aschelminthes"):}`

Answer

To solve the question, we need to analyze each of the provided statements and identify the corresponding phylum for each feature mentioned.

### Step-by-Step Solution:

1. **Statement I**: "The body is supported by a skeleton made up of spicules or spongin fibers with choanocytes lining the spongocoel."
- This description fits **Phylum Porifera** (sponges). Sponges have a skeleton made of spicules or spongin, and they possess choanocytes (collar cells) that line the spongocoel.

2. **Statement II**: "Specialized cells called flame cells help in osmoregulation and excretion."
- This feature is characteristic of **Phylum Platyhelminthes** (flatworms). Flame cells are involved in excretion and osmoregulation in these organisms.

3. **Statement III**: "The body bears eight rows of ciliated comb plates which help in locomotion."
- This statement describes **Phylum Ctenophora** (comb jellies). They are known for having ciliated comb plates that assist in their movement.

4. **Statement IV**: "The alimentary canal is complete with a well-developed muscular pharynx."
- This feature is indicative of **Phylum Nematoda** (roundworms). They possess a complete digestive system with a muscular pharynx.

### Conclusion:
Based on the analysis of the statements, the correct representation of the phylum for each feature is:
- I: Porifera
- II: Platyhelminthes
- III: Ctenophora
- IV: Nematoda

### Final Answer:
The correct option that represents the phyla corresponding to the features mentioned is **Option 4: Ctenophora, Nematoda**.