Assertion : Metals are good conductors of electricity.
Reason : Bromine is the only liquid metal.

Options

A. If both assertion and reason are true and reason is the correct explanation
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that "Metals are good conductors of electricity." This is a well-known fact in chemistry. Metals have free-moving electrons that allow them to conduct electricity efficiently.

2. **Analyzing the Reason:**
- The reason given is "Bromine is the only liquid metal." To evaluate this, we need to identify bromine's classification. Bromine (Br) is actually a non-metal, not a metal. It is unique among non-metals because it exists as a liquid at room temperature, but it is not classified as a metal.

3. **Conclusion:**
- Since the assertion is true (metals are indeed good conductors of electricity) and the reason is false (bromine is a non-metal, not a liquid metal), we conclude that the assertion is true while the reason is false.

4. **Final Answer:**
- Therefore, the correct option is that the assertion is true and the reason is false.