The important ores of tin and lead are

Options

A. Stibnite and Galena
B. Cassiterite and stibnite
C. Cassiterite and galena
D. Calamine and Cyrolite

Explanation

To determine the important ores of tin and lead, we need to identify the primary minerals from which these metals are extracted.

### Step-by-Step Solution:

1. **Identify the Ore of Tin**:
- The main ore of tin is **Cassiterite**.
- Cassiterite is a naturally occurring oxide of tin, represented by the chemical formula **SnO2**.
- It contains approximately **78.8% tin** by weight.

2. **Identify the Ore of Lead**:
- The primary ore of lead is **Galena**.
- Galena is a natural mineral form of lead sulfide, represented by the chemical formula **PbS**.
- It is commonly referred to as lead glance and is the most important source of lead.

3. **Evaluate the Options**:
- Option 1: Stibnite and Galena (incorrect, as Stibnite is an ore of antimony).
- Option 2: Cassiterite and Stibnite (incorrect, as Stibnite is not an ore of tin).
- Option 3: Cassiterite and Galena (correct, as both are important ores).
- Option 4: Calamine and Creolite (incorrect, as Calamine is an ore of zinc and Creolite is not a primary ore).

4. **Conclusion**:
- The correct answer is **Option 3: Cassiterite and Galena**.

### Final Answer:
The important ores of tin and lead are **Cassiterite and Galena**.

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