Assertion : Electric conduction in gases is possible at normal pressure.
Reason : The electric conduction in gases depends only upon the potential difference between the electrodes.

Options

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

Explanation

To analyze the assertion and reason provided in the question, we will break down the concepts of electric conduction in gases and the role of potential difference.

### Step-by-Step Solution

1. **Understanding Electric Conduction in Gases**:
- Electric conduction in gases occurs when the gas is ionized, creating charged particles (ions and electrons) that can move and carry an electric current.
- At normal pressure, the number of ions and electrons generated is relatively low, which affects the overall conduction process.

2. **Assertion Evaluation**:
- The assertion states that "Electric conduction in gases is possible at normal pressure."
- This is true because, although the number of charge carriers (ions and electrons) is low, conduction can still occur. The presence of a potential difference can cause these charge carriers to move, leading to conduction.

3. **Reason Evaluation**:
- The reason states that "The electric conduction in gases depends only upon the potential difference between the electrodes."
- This statement is partially true. While the potential difference is a crucial factor that drives the movement of charge carriers, other factors such as the density of the gas, temperature, and the nature of the gas also play significant roles in determining the extent of conduction.

4. **Conclusion**:
- The assertion is true, but the reason is not entirely accurate because it oversimplifies the factors affecting electric conduction in gases. Therefore, the correct relationship is that the assertion is true, but the reason is not a complete explanation.

### Final Answer:
- The assertion is true, but the reason is false.