JSFiddle - React, Tailwind, and code Playground

HTML

<body>
<input type="radio" value="test" id="radio">test</input>
<select id="select"onchange="test();">
    <option>uncheck</option>
    <option>uncheck2</option>
</select>
</body>

JavaScript

function test() {
    var radio = document.getElementById('radio');
    var select=document.getElementById('select');
    if (select.selectedIndex == '1') { radio.checked = false; }
    if (select.options[select.selectedIndex].innerText == 'uncheck') { radio.checked = false; } 
}