Consider relational schema $R(A,B,C)$ and $S(A,B,C)$
$1)$ Select * from $R$ where $(A,B,C)$ in (Select * from $S$)
$2)$ Select * from $R$ where exists ( Select * from $S$ where R.A=S.A and R.B=S.B and R.C=S.C)
$3)$ Select * from R where $(A,B,C)$ not in((Select * from $R$ where $(A,B,C)$ not in)Select * from S)
Which of the following SQL expression equal to $R\cap S$?