How to create a new line using bootstrap in asp.net mvc checkboxFor?

Question

Hi Team

 

I have create a new checkboxFor, the problem i cant create a new line using bootstrap class. To allow align of the new class. They seem scewed and have this below logic on my Razor in chtml. 

// View

<div class="form-group row">
                            <label for="Dietary requirement" class="col-sm-2 col-form-label">Dietary requirements</label>
                            <div class="col-sm-2">
                                @Html.CheckBoxFor(model => model.DietMain.None)<label for="None">None</label>

                            </div>

                            <div class="form-group row">

                                @Html.CheckBoxFor(model => model.DietMain.Vegetarian, new { @class="col-sm-2" })
                                <br/>
                                <label for="Vegetarian">Vegetarian</label>

                            </div>
                        </div>