An alloy which does not contain copper is :

Options

A. bronze
B. magnalium
C. brass
D. bell metal

Answer

To determine which alloy does not contain copper, we can analyze the composition of each alloy mentioned in the question:

1. **Bronze**: This is an alloy primarily made of copper and tin, and sometimes includes aluminum. Since bronze contains copper, it cannot be the answer.

2. **Magnalium**: This is an alloy composed of aluminum and magnesium. It does not contain copper, making it a potential answer.

3. **Brass**: Brass is an alloy of copper and zinc. Since it contains copper, it cannot be the answer.

4. **Bell Metal**: This is another alloy that consists of copper and tin. As it contains copper, it cannot be the answer.

Based on this analysis, the only alloy that does not contain copper is **magnalium**.

### Final Answer:
The alloy which does not contain copper is **magnalium**.