Which of the following are correctly matched ?

Options

A. Malachite : `CuCO_(3).Cu(OH)_(2)`
B. Chalcopyrite : `CuFeS_(2)`
C. Copper glane : `Cu_(2) S`
D. Azurite : `Cu_(2) O`

Explanation

To determine which of the given compounds are correctly matched with their chemical formulas, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option 1: Malachite**
- Given formula: CuCO3.Cu(OH)2
- Correct formula: Malachite is indeed represented by the formula CuCO3.Cu(OH)2.
- **Conclusion**: This option is correctly matched.

2. **Option 2: Chalcopyrite**
- Given formula: CuFeS2
- Correct formula: Chalcopyrite is correctly represented by the formula CuFeS2.
- **Conclusion**: This option is correctly matched.

3. **Option 3: Copper Glance**
- Given formula: Cu2S
- Correct formula: Copper Glance is correctly represented by the formula Cu2S.
- **Conclusion**: This option is correctly matched.

4. **Option 4: Azurite**
- Given formula: Cu2O
- Correct formula: The correct formula for Azurite is Cu3(CO3)2(OH)2, not Cu2O.
- **Conclusion**: This option is not correctly matched.

### Final Answer:
- The correctly matched compounds are:
- Option 1: Malachite (CuCO3.Cu(OH)2)
- Option 2: Chalcopyrite (CuFeS2)
- Option 3: Copper Glance (Cu2S)
- Option 4 (Azurite) is incorrectly matched.

Thus, the correct options are 1, 2, and 3.