Which one of the following pairs of plants are not seed producers?

Options

A. Fern and Funaria
B. Funaria and Ficus
C. Ficus and Chlamydomonas
D. Punica and Pinus

Answer

To solve the question "Which one of the following pairs of plants are not seed producers?", we will analyze the given options and determine which plants do not produce seeds.

### Step-by-Step Solution:

1. **Understanding Seed Production**:
- Seed production is a characteristic of seed plants, which include spermatophytes (gymnosperms and angiosperms).
- Non-seed producing plants include ferns, mosses, and liverworts, which reproduce via spores.

2. **Analyzing the Options**:
- **Option A: Fern and Funaria**:
- Ferns are pteridophytes and reproduce via spores, not seeds.
- Funaria is a bryophyte (moss) and also reproduces via spores.
- Therefore, both plants in this pair do not produce seeds.

- **Option B: Funaria and Ficus**:
- Funaria (moss) does not produce seeds.
- Ficus (a genus of flowering plants) does produce seeds.
- Thus, this pair includes one seed producer.

- **Option C: Ficus and Chlamydomonas**:
- Ficus produces seeds.
- Chlamydomonas is a unicellular green algae and does not produce seeds.
- Therefore, this pair includes one seed producer.

- **Option D: Punica and Punica**:
- Punica (e.g., Punica granatum, the pomegranate) is a seed-producing plant.
- Hence, this pair consists of seed producers.

3. **Conclusion**:
- The only pair that consists entirely of non-seed producers is **Option A: Fern and Funaria**.

### Final Answer:
**The correct answer is Option A: Fern and Funaria.**