Which of the following natural calamity can lead to 'Radiation' released from stored nuclear waste

Options

A. Floods
B. Volcanic eruptions
C. Earthquakes
D. Tsunami

Answer

To answer the question of which natural calamity can lead to radiation being released from stored nuclear waste, we need to analyze the potential effects of various natural disasters on nuclear waste storage.

### Step-by-Step Solution:

1. **Understanding Nuclear Waste Storage**: Nuclear waste is typically stored in secure containers or underwater to prevent radiation leakage. It is crucial to consider how natural calamities could compromise this storage.

2. **Evaluating Natural Calamities**:
- **Floods**: Floods result from an overflow of water. While they can cause significant damage, they do not typically affect deep underwater storage of nuclear waste directly.
- **Volcanic Eruptions**: These occur due to convection in the Earth's mantle. They primarily affect the surface and are not directly related to the storage of nuclear waste.
- **Earthquakes**: Earthquakes are caused by the movement of tectonic plates. They can lead to structural damage, including to storage facilities for nuclear waste, potentially causing radiation to escape.
- **Tsunamis**: Tsunamis are often caused by underwater earthquakes. They can result in massive waves that can inundate coastal areas, including potential nuclear waste storage sites.

3. **Identifying the Most Likely Culprit**:
- While both earthquakes and tsunamis can be linked to tectonic activity, earthquakes can directly compromise the integrity of storage facilities.
- Tsunamis can also pose a risk, but they are typically a secondary effect of an earthquake.

4. **Conclusion**: The natural calamity most likely to lead to the release of radiation from stored nuclear waste is an **earthquake**. This is because the structural integrity of storage facilities can be compromised by the seismic activity associated with earthquakes.

### Final Answer:
**C. Earthquake**