19 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 answers:  A) 19  B) 20  C) 21  D) 22  E) 23
in case of cycle no of handshakes = no of persons   hence ans = 19   19NSWER:19
<result>A</result>
19 people are there, they are shaking hands together, how many hand shakes possible,if they are in pair of cyclic sequence.