Which one of the following are analogous structures

Options

A. Wings of bat and wings of pigeon
B. Gills of prawn and lungs of man
C. Thorns of Bougainvilla and tendrils of Cucurbita
D. Flippers of dolphin and legs of horse

Explanation

To determine which pair of structures are analogous, we need to follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Analogous Structures**:
- Analogous structures are those that serve similar functions but do not share a common evolutionary origin. They arise due to convergent evolution, where different species develop similar traits independently.

2. **Identify the Given Options**:
- We need to look at the options provided in the question to analyze the structures mentioned.

3. **Analyze Each Option**:
- **Option A**: Wing of bat and wing of pigeon.
- The wing of a bat is a membrane stretched between elongated fingers, while the wing of a pigeon is a modified forelimb with feathers. They serve the same function (flight) but have different anatomical structures and origins.
- **Option B**: Gills of prawn and lungs of man.
- Both are respiratory structures but share a common origin as they are adaptations for breathing in aquatic and terrestrial environments, respectively.
- **Option C**: Thorns of bougainvillea and tendrils of cucurbita.
- Both structures are modifications of stems, serving different functions (protection vs. support) but share a common origin.
- **Option D**: Flippers of dolphin and legs of horse.
- Both are limbs of mammals, serving different functions (swimming vs. walking) but share a common evolutionary origin.

4. **Select the Correct Answer**:
- The only pair that does not share a common origin and is functionally similar is **Option A: Wing of bat and wing of pigeon**. Therefore, they are analogous structures.

### Final Answer:
**The correct answer is Option A: Wing of bat and wing of pigeon.**

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