In which of the following jaws are found

Options

A. Herdmania
B. Fish
C. Petromyzon
D. Amphisouxus

Answer

To determine which of the given options contains jaws, we can analyze each option step by step:

### Step 1: Understand the Classification of Animals
- The question asks about the presence of jaws in certain animals. Jaws are primarily found in the superclass Pisces, which includes both cartilaginous fishes (Chondrichthyes) and bony fishes (Osteichthyes).

### Step 2: Analyze Each Option
1. **Herdmania**:
- Herdmania belongs to the subphylum Urochordata.
- Urochordates are not fishes and do not possess jaws.

2. **Fish**:
- The term "fish" generally refers to members of the superclass Pisces.
- Pisces includes both Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes), both of which have jaws.

3. **Petromyzon**:
- Petromyzon (lamprey) belongs to the class Cyclostomata.
- Cyclostomata are known as jawless fishes, meaning they do not have jaws.

4. **Amphioxis**:
- Amphioxis (lancelet) belongs to the subphylum Cephalochordata.
- Like Urochordates, Cephalochordates are not fishes and do not possess jaws.

### Step 3: Conclusion
- Based on the analysis, the only option that contains jaws is **B. Fish**. The other options (A, C, and D) do not have jaws.

### Final Answer:
The correct option is **B. Fish**.

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