Understanding How to Switch the Return Destination of the Segue

There are screens A, B, and C, and I would like to use the segment on the Storyboard for screen transition.

The transition is
　·Screen A→C
　·Screen B→C
is available.

"At this time, when I press the ""back"" button on screen C, I would like to say ""back to A if you come from A"" or ""back to B if you come from B."""What should I do?

The Back button on screen C in Storyboard is tied to Exit, but you can only choose where to return to either screen A or screen B.

Also, I would like to know how to use segment instead of using presentViewController and dispatchViewControllerAnimated.

Thank you for your cooperation.