$A=\{1,2,3,4\}$

$R1=\{(1,1),(1,2),(2,1),(2,2),(3,4),(4,1),(4,4)\}$

$R2=\{(1,1),(2,3),(3,2)\}$

$R3=\{(1,1),(1,2),(1,4),(2,1),(2,2),(3,3),(4,1),(4,4)\}$

$R4=\{(1,1),(2,2),(3,3),(4,4)\}$

Please identify the Antisymmetric Relations among R$1,$ R$2,$ R$3,$ and R$4.$