An important ore of iron is

Options

A. pyrites
B. malachite
C. haematite
D. sidenite

Answer

To answer the question "An important ore of iron is," we will analyze the information provided in the video transcript and identify the key ores of iron.

### Step-by-Step Solution:

1. **Understanding Ores**: Ores are naturally occurring minerals from which metals can be extracted profitably. For iron, there are several important ores.

2. **Identifying Iron Ores**: The video mentions three important ores of iron:
- **Pyrite (FeS2)**: This is iron disulfide, but it is not primarily used for iron extraction.
- **Hematite (Fe2O3)**: This is one of the most important ores of iron and is widely used for iron extraction.
- **Siderite (FeCO3)**: This is another ore of iron, but less commonly used compared to hematite.

3. **Conclusion**: Among the ores mentioned, Hematite (Fe2O3) is the most significant and widely used ore for extracting iron. Therefore, the answer to the question is Hematite.

### Final Answer:
An important ore of iron is **Hematite (Fe2O3)**.

---