Wing of a bat and wing of a bird are homologous organs

Explanation

**Step-by-Step Solution:**

1. **Define Homologous Organs**: Homologous organs are those that have a similar structure but may serve different functions. They arise from a common ancestor, indicating evolutionary relationships.

2. **Identify the Organs in Question**: In this case, we are comparing the wings of bats and birds. Although both are used for flying, they come from different evolutionary lineages.

3. **Analyze the Origin**: Bats are mammals, while birds belong to a different class of animals (avians). This indicates that their evolutionary origins are distinct.

...