Which of the following is an oxide ore ?

Options

A. Bauxite
B. Cuprite
C. Haematite
D. All of these

Explanation

To determine which of the following is an oxide ore, we can analyze each option provided:

1. **Bauxite**:
- Bauxite is known as an ore of aluminum.
- Its chemical formula is \( \text{Al}_2\text{O}_3 \cdot \text{nH}_2\text{O} \).
- Since it contains oxygen in its formula, it qualifies as an oxide ore.

2. **Cuprite**:
- Cuprite is an ore of copper.
- Its chemical formula is \( \text{Cu}_2\text{O} \).
- This compound also contains oxygen, thus making it an oxide ore.

3. **Hematite**:
- Hematite is a well-known ore of iron.
- Its chemical formula is \( \text{Fe}_2\text{O}_3 \).
- Like the others, it contains oxygen, confirming it as an oxide ore.

4. **All of the Above**:
- Since all three options (bauxite, cuprite, and hematite) are identified as oxide ores due to the presence of oxygen in their chemical formulas, the correct answer is "All of the above".

Thus, the answer to the question "Which of the following is an oxide ore?" is **All of the above**.