<%using (Html.BeginForm("Numbers", "Numbers", FormMethod.Post))
{ %>
<table id="numbers">
    <tr>
        <th>
            prvi_br
        </th>
        <th>
            drugi_br
        </th>
        <th>
            treci_br
        </th>
    </tr>
<%int rb =1; %>"
<% foreach (var item in Model) { %>

    <tr>

        <td>
        <%= Html.Encode(item.prvi_br) %>
        <input type="radio" name="<%= Html.Encode(rb) %>"  value="<%= Html.Encode(rb) %>" />
        </td>
        <td>
        <%= Html.Encode(item.drugi_br) %>
        <input type="radio" name="<%= Html.Encode(rb) %>" value="<%= Html.Encode(rb) %>"/>
        </td>
        <td>
        <%= Html.Encode(item.treci_br) %>
        <input type="radio" name="<%= Html.Encode(rb) %>" value="<%= Html.Encode(rb) %>"/>
        </td>

    </tr>
<% rb++; %>
<% } %>
</table>
        <p>
            <input type="submit" value="Save" />
        </p>
 <%} %>

How post this form with only one checked radio button? In my case all of 3 radio buttons is possible to check. How to restrict so that it is possible check only one radio. In this article I found good solutions but it can not be applied because I have a table.