Which of the following first order logic sentence matches closest with the

sentence "All students are not equal"?

$($A$)$ AAxEEy$[student(x{)}^s$tudent$(y)]=>$notEqual$(x,y)$

$($B$)$ AAxAAy$[student(x{)}^s$tudent$(y)]=>$notEqual$(x,y)$

$($C$)$ AAxEEy$[student(x{)}^s$tudent$(y{)}^n$otEqual$(x,y)]$

$($D$)$ AAxAAy$[student(x{)}^s$tudent$(y{)}^n$otEqual$(x,y)]$