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Write a jQuery statement to remove all <pre> elements with class='prog' and class='old'?

75. Write a jQuery statement to remove all <pre> elements with class="prog" and class="old"?

1. $(".prog#old").remove();
2. $("pre").empty(".prog",".old");
3. $("pre").remove(".prog, .old");
4. $("pre.prog.old").remove();

Answer: C) $("pre").remove(".prog, .old");

Explanation:

The jQuery statement to remove all <pre> elements with class="prog" and class="old" is:

$("pre").remove(".prog, .old");