Add Captcha code in form Bootstrap or using html

Captcha code

 
 <div class='col-md-12 col-sm-12 form-group mb-2 mx-auto'>
          <div class="g-recaptcha" data-sitekey="6LfKURIUAAAAAO50vlwWZkyK_G2ywqE52NU7YO0S" data-callback="verifyRecaptchaCallback" data-expired-callback="expiredRecaptchaCallback"></div>
          <input class="form-control d-none" data-recaptcha="true" required data-error="Please complete the Captcha">
          <div class="help-block with-errors"></div>
      </div>
 
 <script src='https://www.google.com/recaptcha/api.js'></script>
 
 
 // more details
 https://bootstrapious.com/p/bootstrap-recaptcha