in frog the upper eye lid is

Options

A. Rapidly movable
B. Immovable
C. Slightly movable
D. Absent

Answer

To answer the question "In frog, the upper eyelid is:", we will analyze the characteristics of the eyelids in frogs step by step.

### Step-by-Step Solution:

1. **Identify the Eyelids in Frogs**: Frogs have three eyelids: the upper eyelid, the lower eyelid, and a third eyelid known as the nictitating membrane.

2. **Function of the Upper Eyelid**: The upper eyelid in frogs is responsible for blinking. This action helps to keep the eye moist and protects it from debris.

3. **Movement of the Upper Eyelid**: The upper eyelid is not completely immovable. It can move to some extent to blink, which indicates that it is not absent either.

4. **Comparison with Other Eyelids**:
- The lower eyelid is immovable.
- The third eyelid (nictitating membrane) serves a different purpose and is also not the focus of this question.

5. **Conclusion**: Since the upper eyelid can blink and is somewhat movable, the correct description of the upper eyelid in frogs is that it is "slightly movable."

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

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