Ribs : Lungs : : ?

Options

A. Ball : Sphere
B. Hand: Fingers
C. Shell : Nut
D. Coal : Tie

Explanation

To solve the analogy question "Ribs : Lungs : : ? ", we need to analyze the relationship between the first pair of words (Ribs and Lungs) and then find a similar relationship in the options provided.

### Step-by-Step Solution:

1. **Identify the Relationship**:
- Ribs are the bony structures that form the rib cage and protect the lungs. The lungs are located inside the rib cage, which provides them with protection.

2. **Find a Similar Pair**:
- We need to find another pair of words where one item protects or encloses the other.
- A good analogy would be something that has a protective outer layer or shell that contains something more vulnerable.

3. **Consider Options**:
- One common example is a nut and its shell. The shell protects the nut, just like the ribs protect the lungs.
- Therefore, the relationship we are looking for is similar to "Ribs : Lungs" as "Shell : Nut".

4. **Conclusion**:
- Based on the above analysis, the answer to the analogy "Ribs : Lungs : : ? " is "Shell : Nut".

### Final Answer:
**Shell : Nut**