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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><body><form class="w3-container w3-card-4"> <h2>Radio Buttons</h2> <p> <input class="w3-radio" type="radio" name="gender" value="male" checked> <label>Male</label></p> <p> <input class="w3-radio" type="radio" name="gender" value="female"> <label>Female</label></p> <p> <input class="w3-radio" type="radio" name="gender" value="" disabled> <label>Don't know (Disabled)</label></p></form></body></html>