Which of the following is a fish?

Options

A. Sea horse
B. Salmon
C. Bombay duck
D. All of these

Answer

To determine which of the following is a fish, we can analyze each option provided:

1. **Identify the Options**: The options given are:
- Sea horse
- Salmon
- Bomby duck
- All of these

2. **Examine Each Option**:
- **Sea Horse**: The sea horse, also known as hippocampus, is classified as a bony fish because its endoskeleton is made up of bones.
- **Salmon**: Salmon is another type of bony fish, characterized by its bony endoskeleton.
- **Bomby Duck**: The term "bomby duck" seems to be a misinterpretation or typo. However, if we consider it as a fish, it is also classified as a bony fish.

3. **Conclusion**: Since all three options (sea horse, salmon, and bomby duck) are classified as bony fish, the correct answer to the question "Which of the following is a fish?" is:
- **Option Four: All of these**.

### Step-by-Step Solution:
1. Identify the options provided in the question.
2. Analyze each option to determine if it is a fish.
3. Conclude that all listed options are indeed fish.
4. Select the correct answer, which is "All of these".