Given:
8, 9, 5, 15, 12, 25, 4
To make a box-and-whisker plot.
Let us write it in ascending order,
4, 5, 8, 9, 12, 15, 25.
The median of the given data is 9.
The median of the first three numbers is 5.
The median of the last three numbers is 15.
Hence, the correct box-and-whisker plot is given the option he third one.