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<!DOCTYPE html> <html> <body> <form> <select id="mySelect" size="4"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> </form> <br> <button onclick="myFunction()">Remove last option</button> <script> function myFunction() { var x = document.getElementById("mySelect"); if (x.length > 0) { x.remove(x.length-1); } } </script> </body> </html>