In the alumino-thermic process, aluminium acts as

Options

A. oxidising agent
B. a flux
C. a reducing agent
D. a solder

Explanation

### Step-by-Step Solution:

1. **Understanding the Alumino-Thermic Process**:
- The alumino-thermic process, also known as the thermite reaction, involves a reaction between aluminum powder and a metal oxide, typically iron(III) oxide (Fe2O3).

2. **Identifying the Role of Aluminum**:
- In this process, aluminum serves a specific role. It is important to determine whether it acts as an oxidizing agent, reducing agent, flux, or solder.

3. **Chemical Reaction**:
- The reaction can be represented as:
\[ Fe_2O_3 + 2Al \rightarrow 2Fe + Al_2O_3 \]
- In this reaction, aluminum (Al) reacts with iron(III) oxide (Fe2O3) to produce iron (Fe) and aluminum oxide (Al2O3).

4. **Analyzing the Reaction**:
- In the reaction, aluminum is losing electrons (oxidation) and causing the iron(III) oxide to gain electrons (reduction). This means aluminum is facilitating the reduction of Fe2O3 to Fe.

5. **Conclusion**:
- Since aluminum donates electrons and reduces the metal oxide, it acts as a reducing agent in the alumino-thermic process.

6. **Final Answer**:
- Therefore, the correct answer is **C. Reducing agent**.