In a party every person shakes hands with every other person. If there were a total of 136 handshakes in the party then what is the number of persons present in the party ? Choose the correct option.
A) 15	B) 16	C) 17	D) 18	E) 19

Rationale: "explanation : let the number of persons be n â ˆ ´ total handshakes = nc 2 = 136 n ( n - 1 ) / 2 = 136 â ˆ ´ n = 17 answer : c"
Answer: C