Finish the following sentence with the best choice: Identify a one way mirror.

Choices:
- Place your finger on the mirror, if there is a gap between the reflection and your finger tip, it is a one way mirror.
- Place your finger on the mirror, if there is no gap between the reflection and your finger tip, it is a one way mirror.

Answer:
Place your finger on the mirror, if there is a gap between the reflection and your finger tip, it is a one way mirror.