in frog the upper eyelid is

Options

A. absent
B. slightly moves
C. Rapidly movable
D. immovable

Answer

To answer the question "In frog, the upper eyelid is:", we need to analyze the characteristics of the upper eyelid in frogs based on the information provided.

### Step-by-Step Solution:

1. **Understanding Frog Anatomy**: Frogs have unique adaptations in their anatomy, including their eyelids. They possess three types of eyelids, which serve different functions.

2. **Identifying the Upper Eyelid**: The question specifically asks about the upper eyelid of the frog. It is important to note how this eyelid behaves in relation to the frog's eye movements.

3. **Movement of the Upper Eyelid**: The upper eyelid in frogs is not completely absent, nor is it immovable. Instead, it has a specific function. It moves in coordination with the eye movements of the frog.

4. **Determining the Correct Option**:
- The upper eyelid is not absent (this option is incorrect).
- It does not move rapidly; instead, it moves slightly (this option is correct).
- It is not immovable (this option is incorrect).

5. **Conclusion**: Based on the analysis, the correct answer is that the upper eyelid of the frog is "slightly movable."

### Final Answer:
The upper eyelid in frogs is **slightly movable**.

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