public class PlatInspHistoryModels
 {
  public List<RadioButtonItem> RadioButtonList { get; set; }
  public string SelectedRadioButton { get; set; }
}

public class RadioButtonItem
{
    public string Name { get; set; }
    public bool Selected { get; set; }
    public string Value { get; set; }
    public bool Visible { get; set; }
}

public ActionResult Index()
    {
        var viewModel = new PlatInspHistoryModels
        {
            RadioButtonList = new List<RadioButtonItem>
                                                      {
                                                          new RadioButtonItem
                                                              {
                                                                  Name = "Topside", Value = "T",Selected = true,Visible = true
                                                              },
                                                          new RadioButtonItem
                                                              {
                                                                  Name="Underwater", Value = "U",Selected = false,Visible = true
                                                              }
                                                      }
        };
        return View(viewModel);
    }

@using (Html.BeginForm("Index", "PlatInspHistory", FormMethod.Post, new { id = "form" }))
     {
    <table cellpadding="4" cellspacing="4">
                <tr>
                    <td>

                        foreach (Cairs2.Models.RadioButtonItem item in Model.RadioButtonList)
                        {
                            @Html.DisplayFor(i => item.Name)
                            @Html.RadioButton("PlatInspHistoryModels.SelectedRadioButton", item.Value, item.Selected, new { @class = "formCheckbox", tabindex = "1" })
                        }


                    </td>
  </tr>
            </table>
  }

[HttpPost]
    public ActionResult Index(PlatInspHistoryModels model)
    {
  }

for (var i = 0; i < Model.RadioButtonList.Count; i++)
{
    @Html.DisplayFor(x => x.RadioButtonList[i].Name)
    @Html.HiddenFor(x => x.RadioButtonList[i].Name)
    @Html.RadioButtonFor(x => x.SelectedRadioButton, Model.RadioButtonList[i].Value, new { @class = "formCheckbox", tabindex = "1" })
}

@foreach (var item in Model)
{<tr>
<td>
@Html.DisplayFor(modelItem=>item.Qid)</td>
  <td>  @Html.DisplayFor(modelItem => item.Question)</td> <td>
      @Html.RadioButton("skillsq1", new { id = "1"}).
          @Html.DisplayFor(modelItem => item.AnsOpt1)</td><td>
   @Html.RadioButton("skillsq1", new { id = "2"})
      @Html.DisplayFor(modelItem => item.AnsOpt2) </td><td>
  @Html.RadioButton("skillsq1", new { id = "3" })
@Html.DisplayFor(modelItem => item.AnsOpt3) </td> <td>

@Html.RadioButton("skillsq1", new { id = "4" })
 @Html.DisplayFor(modelItem => item.AnsOpt4) </td> </tr>}