Which of the following JavaScript snippets will correctly return an element from the DOM with an id of myId?

Var $x=$ document. querySelector$("$myId$")$;

var $x=$ document.getElementByTagName $("$myId$")$;

var $x=$ document.querySelector$("$#myId"$)$;

var $x-$ document.getElementById$("$myId$")$;

var $x=$ document.getElementById$("$#myId"$)$;