In PMU's auditorium, you are in charge of seating the Prince, the Prince's Son, the Rector, the Vice-Rector, and the Dean of student affairs at the head table of the auditorium. In how many ways can you seat the guests in the S chairs on one side of the table?
Hint: P(nr) = n!/(n-r!) and C(nr) = n!/[(r!)(n-r!)]
A: 121
B: 24
C: None
D: 122