Given the relation R $=\{($n$,$ m$)|$ n$,$ m in $,$ n $<0$ m $>0\}.$ Which of the following relations defines the inverse of R$?$

Question $7$ options:

R$=\{($n$,$ m$)|$ n$,$ m in $,$ n $>=0$ m $<=0\}$

R$=\{($n$,$ m$)|$ n$,$ m in $,$ n $<0$ m $>0\}$

R$=\{($n$,$ m$)|$ n$,$ m in $,$ n $>0$ m $<0\}$

R$=\{($n$,$ m$)|$ n$,$ m in $,$ n $>0$ m $<0\}$