There are 10 sections in the whole spinner.
Divide 360 degrees (full circle) by 10 to get the measurement of each section.

Each section is 36 degrees apart.
Label i to label g is 2 sections counterclockwise apart.

The degree of rotation (counterclockwise) about the spinner that maps label i to label g is 72 degrees.
The answer is the first choice. Hope this helps! :)