Which of the following is a conductor of electricity ?

Options

A. Silver
B. Copper
C. Aluminium
D. All of these

Answer

To determine which of the given options is a conductor of electricity, we can follow these steps:

### Step 1: Understand the concept of electrical conductivity
- Electrical conductivity refers to the ability of a material to allow the flow of electric current. Conductors are materials that have free electrons that can move easily, allowing electricity to pass through them.

### Step 2: Analyze the options
- The options given are:
1. Silver
2. Copper
3. Aluminium
4. All of these

### Step 3: Evaluate each option
- **Silver**: Silver is known to be one of the best conductors of electricity due to its high number of free electrons.
- **Copper**: Copper is also an excellent conductor and is widely used in electrical wiring because of its good conductivity and relatively low cost.
- **Aluminium**: Aluminium is a good conductor of electricity as well, although not as good as silver or copper, it is still used in various electrical applications.

### Step 4: Conclusion
- Since all three materials (silver, copper, and aluminium) have free electrons and can conduct electricity, the correct answer is:
- **All of these**

### Final Answer:
- The answer is **All of these**.

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