In a Function, every person shakes hand with every other person. If there was a total of 28 handshakes in the function, how many persons were present in the Function? Choose the correct option:	A) 8	B) 7	C) 2	D) 6	E) 5

Rationale: suppose there are nn persons present in a function and every person shakes hand with every other person . then , total number of handshakes = nc 2 = n ( n − 1 ) / 2 n ( n − 1 ) = 28 × 2 n ( n − 1 ) = 56 n = 8 answer a 8
Answer: A