27.

Shown below is an intermediate in glycogen breakdown, where each "o" represents a glucose unit:

          o-o-o-o\
                  o-o-o-o-o-CORE
          o-o-o-o/

The product(s) of the next reaction is/are:

  o-o-o\
a.      o-o-o-o-o-CORE + Glucose 1-P
o-o-o-o/                                        /o-o-o-o-o-CORE
                            b.   o-o-o-o-o-o-o-o
    o-o\
c.      o-o-o-o-o-CORE + maltose    o\
o-o-o-o/                         d.   o-o-o-o-o-CORE 
                              o-o-o-o/          + 3 free glucose
            o\
e.            o-o-o-o-o-CORE
o-o-o-o-o-o-o/