JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <label><input type="radio" name="q1" value="1" />Resposta 1</label>
    <label><input type="radio" name="q1" value="2" />Resposta 2</label>
    <label><input type="radio" name="q1" value="3" />Resposta 3</label>
    <label><input type="radio" name="q1" value="4" />Resposta 4</label>
</form>

<div id="message"></div>

CSS

label { display: block; }
#message { margin-top: 20px; }

JavaScript

var respostaQ1 = 3; // Resposta correta

$("input[name=q1]").on("click", function() {
    var value = $(this).val();
    var message = "";
    
    respostaQ1 == value ? message = "Certo!" : message = "Errado";
    
    $("#message").html(message);
});