Select the equivalence relation. Select all the applies.

If $A=\{1,2,3\},$ then relation $R$:$A$A such that $R=\{(1,3),(3,3),(1,1),(2,2),(3,1)\}$

If $N=\{1,2,3,$dots$\},$ then relation $R$:$NN$ such that $R=\{(a,b)|a=b\}$

If $N=\{1,2,3,$dots$\},$ then relation $R$:$NN$ such that $R=\{(a,b)|a>b\}$

If $N=\{1,2,3,$dots$\},$ then relation $R$:$NN$ such that $R=\{(a,b)|ab\}$

If $A=\{1,2\},$ then relation $R$:$A$A such that $R=\{(1,2),(2,1)\}$

If $A$ is the set of all pentagons, then relation $R$:$A$A such that is similar to $b$