JSFiddle - React, Tailwind, and code Playground

HTML

<select id="sel_zap">
<option value="1">1</option>
<option value="2">2</option>
</select>
 
<select id="sel_cuo">
<option value="1">1</option>
<option value="2">2</option>
</select>

CSS

.off {
	display: none;
}

JavaScript

console.clear();

$("#sel_zap").change(function() {
	var zap = $(this).children(":selected").val();
	$("#sel_cuo option[value="+zap+"]").addClass("off");
});