Can a substance exist in all the three states of matter? Give an example.

Explanation

**Step-by-Step Solution:**

1. **Understanding States of Matter**: Recognize that matter can exist in three primary states: solid, liquid, and gas. Each state has distinct properties.

2. **Identifying a Substance**: To answer the question, we need to identify a substance that can exist in all three states of matter.

3. **Example of a Substance**: Water is a well-known example of a substance that can exist in all three states.

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