Should be SC/PC.
I've never seen a piece of Cisco equipment that uses SC/APC. When they bother to specify more than just SC in the documentation, it's always been SC/PC.
There are other connector types that are compatible with SC/PC: for example, SC/SPC or SC/UPC. However, SC/APC is NOT compatible with anything else except SC/APC. That's why they generally make the APC connector body or the strain relief behind it green in color, to distinguish it from other types.
If you connect an SC/APC to something other than SC/APC, the result will be more insertion and return loss than either connector type would produce on its own.
Search http://www.cisco.com for the term "SC/APC" and you will find warnings that connecting an SC/APC connector to some Cisco equipment can damage the receiving optics.
Stay away from SC/APC unless you know you need it. You'll know when you need it: they'll tell you.
