If a big wave rocked your boat and threw your mother and your wife into the violent and dangerous sea, one to the left side and the other to the right side of the boat. You have only one life buoy on the boat, you will use the life buoy to:
(a) save your wife;
(b) save your mother;
(c) none of the above.
WARNING: if you answer this question wrongly, you will FAIL the WHOLE exam regardless of how many other questions you get right!