Question: What is the difference between the following line-height settings?

1. The value of 20px will set the line-height to 20px. The value of 2 will set the line-height to twice the size of the corresponding font-size value.
2. The value of 20px will set the line-height to 20px. The value of 2 is not valid.
3. The value of 20px will set the line-height to 20px. The value of 2 will default to a value of 2px.
4. The value of 20px will set the line-height to 20px. The value of 2 will set the line-height to 20% of the corresponding font-size value.

Answer: The correct answer of the above question is Option A:The value of 20px will set the line-height to 20px. The value of 2 will set the line-height to twice the size of the corresponding font-size value.