Which one is malachite from the following

Options

A. `CuCO_(3).Cu(OH)_(2)`
B. `CuFeS_(2)`
C. `Cu(OH)_(2)`
D. `Fe_(3)O_(4)`

Explanation

To determine which option represents malachite, we can follow these steps:

1. **Understand the Definition of Malachite**: Malachite is a mineral and an ore of copper. It is known for its distinctive green color and is primarily composed of copper carbonate and copper hydroxide.

2. **Identify the Chemical Formula of Malachite**: The chemical formula for malachite is CuCO3·Cu(OH)2. This indicates that malachite consists of copper carbonate (CuCO3) and copper hydroxide (Cu(OH)2).

3. **Analyze the Given Options**:
- Option A: CuCO3·Cu(OH)2
- Option B: CuFeS2 (This is chalcopyrite, another copper ore but not malachite)
- Option C: Cu(OH)2 (This is copper hydroxide, not malachite)
- Option D: Fe3O4 (This is magnetite, an iron ore, not related to copper)

4. **Match the Options with the Formula of Malachite**:
- Compare each option with the known formula of malachite (CuCO3·Cu(OH)2).
- Only Option A matches the formula of malachite.

5. **Conclusion**: Based on the analysis, the correct answer is Option A: CuCO3·Cu(OH)2.

### Final Answer:
The correct option that represents malachite is **Option A: CuCO3·Cu(OH)2**.