23 people are there, they are shaking hands together, How many hand shakes possible, if they are in pair of cyclic sequence ? Choose the correct choice from the following choices.
A) 20
B) 77
C) 66
D) 88
E) 11
20nswer:20
<result>A</result>
23 people are there, they are shaking hands together, How many hand shakes possible, if they are in pair of cyclic sequence ?