<ItemTemplate>
                                <tr>
                                    <td bgcolor="yellow">
                                        <%#DataBinder.Eval(Container.DataItem, "id")%>
                                    </td>
                                    <td bgcolor="yellow">
                                        <%#DataBinder.Eval(Container.DataItem, "answer")%>
                                    </td>
                                    <td>
                                        <asp:RadioButtonList ID="RadioButtonList1" runat="server">
                                            <asp:ListItem></asp:ListItem>
                                            <asp:ListItem></asp:ListItem>
                                            <asp:ListItem></asp:ListItem>
                                        </asp:RadioButtonList>
                                    </td>
                                </tr>
                            </ItemTemplate>

RadioButtonList1.DataSource = DataSetAnswer.Tables["Answer"];
RadioButtonList1.DataBind();

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        RadioButtonList rbl = e.Item.FindControl("RadioButtonList1") as RadioButtonList;
        if (rbl != null)
        {
            rbl.DataSource = DataSetOcenka.Tables["Ocenka"];
            rbl.DataValueField = DataSetOcenka.Tables["Ocenka"].Columns[ 0 ].ColumnName;
            rbl.DataTextField = DataSetOcenka.Tables["Ocenka"].Columns[ 1 ].ColumnName;
            rbl.DataBind();
        }
    }