Homologous organs are

Options

A. Human eyes and Squid eyes
B. Gills of fish and lungs of Man
C. Hands of Man and wings of Bat
D. Leaf of moss and frond of Fern.

Answer

### Step-by-Step Solution:

1. **Understanding the Definition of Homologous Organs**:
- Homologous organs are body parts that share a common structural framework and origin, even though they may serve different functions in different organisms. This concept is rooted in evolutionary biology, indicating that these organs have evolved from a common ancestor.

2. **Identifying Examples of Homologous Organs**:
- To identify homologous organs, we can look for structures in different species that have similar anatomical features despite differing functions. For example, the forelimbs of mammals (like humans) and the wings of birds are homologous because they share a similar bone structure.

3. **Evaluating the Given Options**:
- The question provides several pairs of organs to evaluate:
- **Human eye and squid eye**: While they may serve similar functions (vision), they do not share a common structural framework. Thus, they are not homologous.
- **Gills of fish and lungs of man**: These organs serve different functions (respiration in water vs. air) and do not share a common structure, making them non-homologous.
- **Hands of man and wings of bird**: These are indeed homologous organs as they share a similar bone structure despite their different functions.
- **Leaf of moss and frond of pond**: These do not share a common structural framework, thus they are not homologous.

4. **Conclusion**:
- Based on the evaluation, the correct answer to the question "Homologous organs are" is the **hands of man and wings of bird**.