Which of these is an alloy of aluminium, copper, manganese and magnesium?

Options

A. Stainless steel
B. Magnalium
C. Duralumin
D. Solder

Answer

To solve the question of which alloy is made of aluminum, copper, manganese, and magnesium, we can follow these steps:

### Step 1: Identify the Alloys
We need to look at the options provided: stainless steel, magnolium, uralumine, and solder.

### Step 2: Analyze Each Alloy
- **Stainless Steel**: This is an alloy primarily made of iron, chromium, and nickel. It does not contain aluminum, copper, manganese, or magnesium.

- **Magnolium**: This is an alloy of magnesium and aluminum. It does not include copper or manganese.

- **Uralumine**: This alloy is specifically known to be composed of aluminum, copper, manganese, and magnesium.

- **Solder**: This is typically an alloy of tin and lead (or other metals) and does not include aluminum, copper, manganese, or magnesium.

### Step 3: Conclusion
From the analysis, we can conclude that the alloy that contains aluminum, copper, manganese, and magnesium is **uralumine**.

### Final Answer
The alloy of aluminum, copper, manganese, and magnesium is **uralumine**.

---