JSFiddle - React, Tailwind, and code Playground

HTML

<form id="optionForm">
    <div id="chooseSource">
        <div class="selected">
            <input type="radio" id="source1" name="source" value="www" checked="checked" />
            <label for="source1">Website</label>
        </div>
        <div>
            <input type="radio" id="source2" name="source" value="mag" />
            <label for="source2">Magazine</label>
        </div>
        <div>
            <input type="radio" id="source3" name="source" value="per" />
            <label for="source3">Friend</label>
        </div>
        <div>
            <input type="radio" id="source4" name="source" value="oth" />
            <label for="source4">Other</label>
        </div>
        <div id="cbHolder">
            <span>
                <input type="checkbox" id="sourceCb1" name="sourceCb" value="" />
                <label for="sourceCb1">Checkbox item 1 for other</label>
            </span>
            <span>
                <input type="checkbox" id="sourceCb2" name="sourceCb" value="" />
                <label for="sourceCb2">Checkbox item 2 for other</label>
            </span>
            <span>
                <input type="checkbox" id="sourceCb3" name="sourceCb" value="" />
                <label for="sourceCb3">Checkbox item 3 for other</label>
            </span>
        </div>
    </div>
</form>

CSS

.selected { color: red }

JavaScript

$("#chooseSource input:radio").change(function(e){
    $("#chooseSource input:radio").parent().removeClass("selected")
         $(this).parent().addClass("selected");
    
});

$("#chooseSource input:checkbox").change(function(){
   //toggle class for this select box
   $(this).parent().toggleClass("selected");
    
    if($(this).is(":checked")){
    //remove all classes from radio boxes
    $("#chooseSource input:radio").parent().removeClass("selected")
    $(this).parent().parent().prev().find("input:radio").attr("checked", true);
        $(this).parent().parent().prev().find("input:radio").parent().addClass("selected");
 
    }
});