Extrinsic growth can be seen in
Mountains
Animals
Viruses
Boulders
Sand mounds
Rolling ice

Options

A. A, D, E, F
B. B, C, D, E

C. C, D, E, F
D. A,B,D, E

Explanation

To determine which of the given options exhibit extrinsic growth, we need to understand the difference between intrinsic and extrinsic growth.

### Step-by-Step Solution:

1. **Define Extrinsic Growth**:
- Extrinsic growth refers to growth that occurs from outside an object or organism. It is typically associated with non-living entities where the growth is not a result of cellular processes.

2. **Identify the Types of Growth**:
- **Intrinsic Growth**: This is the growth that occurs from within, characteristic of living organisms (like animals and plants).
- **Extrinsic Growth**: This is the growth that occurs from external factors, typical of non-living entities.

3. **Analyze Each Option**:
- **Mountains**: These can grow through geological processes like erosion and sediment deposition, which is an extrinsic process.
- **Animals**: They grow intrinsically through cellular division and metabolism.
- **Viruses**: They do not grow in the traditional sense; they replicate within host cells, which is an intrinsic process.
- **Boulders**: They can accumulate and change shape due to external forces like weathering, indicating extrinsic growth.
- **Sand Mounds**: These can form and grow due to wind and water action, which is extrinsic growth.
- **Rolling Ice**: Glaciers can grow and change shape due to external environmental factors, indicating extrinsic growth.

4. **Conclusion**:
- The options that exhibit extrinsic growth are **Mountains, Boulders, Sand Mounds, and Rolling Ice**. Therefore, the correct answer includes these options.

### Final Answer:
The correct options that exhibit extrinsic growth are:
- Mountains
- Boulders
- Sand mounds
- Rolling ice