An element A dissolves both in acid and alkali. It is an example of

Options

A. Allotropic nature of A
B. Dimorphic nature of A
C. Amorphous nature of A
D. Amphoteric nature of A

Explanation

To solve the question, "An element A dissolves both in acid and alkali. It is an example of," we need to analyze the given options and understand the definitions of each term.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- We are looking for an element that can dissolve in both acids and alkalis.

2. **Analyzing the Options**:
- **Allotropic**: This refers to elements that can exist in two or more different forms in the same physical state (e.g., carbon can exist as graphite or diamond). This does not relate to solubility in acids or bases.
- **Dimorphic**: This is a specific case of allotropy where an element can exist in two different forms. Again, this does not relate to solubility in acids or bases.
- **Amorphous**: This term refers to substances that do not have a defined crystalline structure. It does not imply solubility in acids or bases.
- **Amphoteric**: This describes substances that can react with both acids and bases.

3. **Identifying the Correct Option**:
- Since the question specifies that the element dissolves in both acid and alkali, the correct classification for such an element is **amphoteric**. Amphoteric substances can react with both acids and bases, which aligns with the behavior described in the question.

4. **Conclusion**:
- Therefore, the correct answer is that the element A is an example of **amphoteric**.

### Final Answer:
The element A is an example of **amphoteric**.

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