remove event listeners

hi, i have 5 buttons, only one is the correct and leads to the next frame, the others shows a wrong message,

the problem is, in the next frame, i wanted to do all the same but change one button, but i cant remove the event listeners of the code from the previous frame,

i look many forums and videos, and all the code i tried didn't work,

wonder if someone could help, heres the code:

stop();

ex1.stop();

ex2.stop();

ex3.stop();

ex4.stop();

ex5.stop();

//p1

p1.addEventListener(MouseEvent.CLICK, goP1);

function goP1(event:MouseEvent):void

{

  ex1.play();

}

//p2

p2.addEventListener(MouseEvent.CLICK, goP2);

function goP2(event:MouseEvent):void

{

  ex2.play();

}

//p3

p3.addEventListener(MouseEvent.CLICK, goP3);

function goP3(event:MouseEvent):void

{

  ex3.play();

}

//p4

p4.addEventListener(MouseEvent.CLICK, goP4);

function goP4(event:MouseEvent):void

{

  Object(root).gotoAndStop(12)

}

//p5

p5.addEventListener(MouseEvent.CLICK, goP5);

function goP5(event:MouseEvent):void

{

  ex5.play();

}