20 people are there, they are shaking hands together, how many hand shakes possible, if they are in pair of cyclic sequence.	Answers:
A) 21
B) 20
C) 40
D) 42
E) 19
n for cyclic hand shake and n-1 for linear handshake.   so here no of hand shake is 20.   ANSWER:20
<result>B</result>
20 people are there, they are shaking hands together, how many hand shakes possible, if they are in pair of cyclic sequence.