South Carolina is in the Southeastern United States. It is south of North Carolina and east of Georgia.
90° north latitude is the location of the north pole. 90° south latitude is the location of the south pole.
The south pole lies at 90 degrees south.
South pole
The North Pole is at 90 North & the South Pole is at 90 South.
That's the location of the south pole.
"90 degrees south" is the definition of the south pole. That location is deep in the interior of the Antarctic continent, on which there are no countries.
46 Degrees south 90 degrees north
The latitude of that point is 30 degrees south, and its longitude is 90 degrees east.
Latitude is the location distance north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles.
One point of absolute location in Antarctica is 90 Degrees S, which happens to be the location of the South Pole.
Latitude and longitude are angles, and are stated in degrees and fractions of degrees.
-- No location can have both a north coordinate and a south one (unless it's on the equator and its latitude is zero, so it makes no difference whether you call it zero north or zero south). -- And whatever the latitude of the location is, it can't be more than 90 degrees, either north or south. "90 degrees north" is the north pole, "90 degrees south" is the south pole, and no place is either more norther or more souther than those.