Un Check radio button on second time selected

Radio button in general can't be un checked when we select for the second time.
We can do it using code.

Ex: if we have below radio buttons

<input type="radio" id="rbnEgg" name="rdNV" value="Egg" runat="server"  />
  <label for="rbnEgg">Egg</label>
  <input type="radio" id="rbnChicken" name="rdNV" value="Chicken" runat="server" />
  <label for="rbnChicken">Chicken</label>

Use below script to check and uncheck the selection

<script language="javascript">
 $(document).on("click", "input[name='rdNV']", function(){
    thisRadio = $(this);
    if (thisRadio.hasClass("imChecked")) {
        thisRadio.removeClass("imChecked");
        thisRadio.prop('checked', false);
    } else {
        thisRadio.prop('checked', true);
        thisRadio.addClass("imChecked");
        if (thisRadio.context.id == 'rbnEgg') {
            $('input[id=rbnChicken]').removeClass("imChecked");
            $('input[id=rbnChicken]').prop('checked', false);
        }
        else if (thisRadio.context.id == 'rbnChicken') {
           $('input[id=rbnEgg]').removeClass("imChecked");
           $('input[id=rbnEgg]').prop('checked', false);
        }
    };
        })

Here i am un-checking only one radio button, if there are multiple radio buttons uncheck all the radio buttons before the statement : thisRadio.prop('checked', true);