CountryDetials countrydetials = new CountryDetials();
 var model = GetCurrency(countrydetials.Country);
 countrydetials.Currency = model.FirstOrDefault().Currency;

@Html.DropDownListFor(m => m.Currency, new List<SelectListItem>
                  {
                    new SelectListItem {Value = "INR", Text="Indian Rupee" },
                    new SelectListItem {Value = "NPR", Text = "Nepalese Rupee" },

                  },
                    new { @class = "form-control" })



  @Html.DropDownListFor(m => m.Country, new List<SelectListItem>
                           {

                               new SelectListItem {Value = "IND", Text = "India" },
                               new SelectListItem {Value = "NEP", Text = "Nepal" },
                               new SelectListItem {Value = "SIN", Text = "Singapore" },
                               new SelectListItem {Value = "USA", Text = "USA" },

                           },
                                new { @class = "form-control"})