JSFiddle - React, Tailwind, and code Playground

by Niffler

HTML

<input type="radio" name="question_1" value="option_1" onclick="checkValue(this);" /> Hyper Text Markup Languages <br /> <br />
    <input type="radio" name="question_1" value="option_2" onclick="checkValue(this);" /> Highest Text Markup Language <br /> <br />
    <input type="radio" name="question_1" value="option_3" onclick="checkValue(this);" /> Hyper Total Markup Language <br /> <br />
    <input type="radio" name="question_1" value="option_4" onclick="checkValue(this);" /> Hyper Text Markup Language <br /> <br />

JavaScript

function checkValue(option) {

    var radiobuttons = document.getElementsByName(option.name);
    for(i = 0; i < radiobuttons.length; i++) {
        radiobuttons[i].disabled = true;
    }
    
    if (option.value == "option_4") {
        alert("Correct");
    } else {
        alert("False, Option (4) is the Correct Answer.");
    }
}