<form>
                    <div class="form-group ">
                        <div class="radio">
                            <label>
                                <input type="radio" name="answer" required="required" value="Paris">
                                Paris
                            </label>
                        </div>
                        <div class="radio">
                            <label>
                                <input type="radio" name="answer" required="required" value="Bordeaux">
                                Bordeaux</label>
                        </div>
                        <div class="radio">
                            <label>
                                <input type="radio" name="answer" required="required" value="Belfast">
                                Belfast
                            </label>
                        </div>
                </form>