Which of the following below to class osteichthyes?
a. sea urchin, b. sea horse, c.flying fish, d. say fish, e. dog fish

Options

A. b and c
B. a,b and e
C. b and e
D. a,d and e

Answer

To determine which of the given options belong to the class Osteichthyes (bony fish), we can follow these steps:

### Step 1: Understand the Classification
Osteichthyes, commonly known as bony fish, are one of the major classes of fish. They are characterized by a bony skeleton, as opposed to cartilaginous fish like sharks and rays, which belong to the class Chondrichthyes.

### Step 2: Analyze Each Option
- **a. Sea Urchin**: This is not a fish; it is an echinoderm.
- **b. Seahorse**: This is a type of fish and belongs to the class Osteichthyes.
- **c. Flying Fish**: This is also a type of fish and belongs to the class Osteichthyes.
- **d. Say Fish**: This is likely a typographical error and may refer to "sawfish," which belongs to Chondrichthyes.
- **e. Dog Fish**: This refers to a type of shark, which belongs to Chondrichthyes.

### Step 3: Identify the Correct Answers
From the analysis:
- The **seahorse** (b) and the **flying fish** (c) are both members of the class Osteichthyes.
- The other options (sea urchin, say fish, dog fish) do not belong to this class.

### Conclusion
The correct options that belong to the class Osteichthyes are:
- **b. Seahorse**
- **c. Flying Fish**

Therefore, the final answer is: **b and c**.

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