How to bind Choice field Column with DropDownList in SharePoint

Guid siteId = SPContext.Current.Site.ID;
SPSecurity.RunWithElevatedPrivileges(delegate()
{

using (SPSite site = new SPSite(siteId))
{
using (SPWeb objSPWeb = site.RootWeb)
{
SPList objSPList = objSPWeb.Lists[CIRPD.Common.Constants.LIST_ACADEMIC_COMMUNITY_RESEARCHERS];
SPFieldChoice field = (SPFieldChoice)objSPList.Fields["Highest Degree"];
AcademicPosition.DataSource = field.Choices;
AcademicPosition.DataBind();
}
}
});