How do I generateresult for online test

i am developing online test system using as.net. i have used repeater control and within repeater label for question and radiobuttons for option i.e mcq opion , i am not able to access those radiobutton to create final report(result),also i have bound those radiobutton with database using eval method ,and my datbase contaion column as col1:question,col2: optiona col3:optionb, col4:optionc col5:optiond col5:correctoption so i want to compare the value of selected radio button with column correctoption to generate report my aspx code:
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<asp:Repeater ID="Repeater1" runat="server">
   <HeaderTemplate>

   </HeaderTemplate>
   <ItemTemplate>
   <div align="left">
   <table >
   <tr >
   <td>
       <asp:Label ID="Label1" runat="server" Text='<%# Eval("Question") %>' CssClass="label-primary" Font-Size="Small"></asp:Label>
    <br /></td>
    </tr>
    <tr>
    <td class="pull-left">
        <asp:RadioButton ID="RadioButton1" runat="server" OnCheckedChanged="check"  Text='<%# Eval("optiona") %>'  GroupName="group"/>
       <br /></td></tr>
       <tr>
       <td class="pull-left">
       <asp:RadioButton ID="RadioButton2" runat="server" OnCheckedChanged="check" Text='<%# Eval("optionb") %>'  GroupName="group"/>
       <br />
       </td>
             </tr>
       <tr>
       <td class="pull-left">
       <asp:RadioButton ID="RadioButton3" runat="server" OnCheckedChanged="check" Text='<%# Eval("optionc") %>'  GroupName="group"/>
       <br /></td></tr>
       <tr>
       <td class="pull-left">
       <asp:RadioButton ID="RadioButton4" runat="server"  OnCheckedChanged="check" Text='<%# Eval("optiond") %>'  GroupName="group"/>
   </td>
   </tr>
   </table>
   </div>
   </ItemTemplate>
   <SeparatorTemplate>
   <br /><hr /><br />
   </SeparatorTemplate>
   <FooterTemplate>
   <table>
   <tr><td>
       <asp:LinkButton ID="SubmitAnswers" runat="server" CssClass="alert-link" Font-Bold="true" Font-Size="X-Large" OnClick="lnk_click">submit</asp:LinkButton></td><td width="15px"></td><td>
           <asp:LinkButton ID="LinkButton2" runat="server" CssClass="alert-link" Font-Bold="true" Font-Size="X-Large">Cancel</asp:LinkButton></td></tr>
   </table>
   </FooterTemplate>
   </asp:Repeater>
creating report means i have show the result the counting of the marks that end user scored.so for that i have to compare the value which end user has selected i.e radiobutton he/she has selected with the correct ans which i have stored in database with table name test my database table test questionID int question nvarchar(255) optiona  varchar(255)    optionb varchar(255)    optionc varchar(255)    optiond varchar(255)    correctans varchar(255) questioncat varchar(255)    thank you for your concern and reply. :)