Automatically select a radiobutton when selecting an item from a drop down list

Question

I have a grouped list of 4 radiobuttons. 2 of them are simply radiobuttons with labels, however, two of them are radiobuttons with drop downs.

Is it possible to have the corresponding radiobutton selected if I select an item from one of the drop downs?

For example, the following will allow the user to click on the label to select a radiobutton.

<asp:RadioButton id="rdoOne" runat="server" /><label for="<%=rdoOne%>">One</Label>

I would like to replace the label with a drop down list and have similar functionality whereby the radiobutton is selected automatically.