Complete the analogy
Humans : DAN :: viroids :: ?

Options

A. DNA
B. RNA
C. DNA or RNA
D. Proteins

Answer

To complete the analogy "Humans : DNA :: viroids : ?", we need to identify the genetic material associated with viroids, similar to how DNA is the genetic material for humans.

### Step-by-Step Solution:

1. **Identify the Genetic Material for Humans**:
- Humans possess DNA (Deoxyribonucleic Acid) as their genetic material. This is fundamental to understanding the analogy.

2. **Understand Viroids**:
- Viroids are infectious agents that are much smaller than viruses. They are known to cause diseases in plants, such as Potato Spindle Tuber Disease.

3. **Determine the Genetic Material of Viroids**:
- Unlike viruses, viroids do not have a protein coat. Their genetic material is made up of RNA (Ribonucleic Acid) and is not encapsulated by proteins.

4. **Complete the Analogy**:
- Since humans are associated with DNA, and viroids are associated with RNA, the completed analogy is:
- Humans : DNA :: viroids : RNA.

### Final Answer:
**Viroids : RNA**