How to associate labels with radio buttons

You have two different ways to implement this.

The first one is the simple solution is to embed the radio button inside a <label/> tag.

<p>
    <label><%=Html.RadioButton("option", "yes") %> Yes</label>
</p>

<p>
    <label><%=Html.RadioButton("option", "no") %> No</label>
</p>

The second path is to associate each radio button with an ID. This is also quite simple with the htmlAttributes argument and it allows for more flexibility in regard to the form layout:

<p>
    <label for="option_yes">Yes:</label>
    <%=Html.RadioButton("option", "yes", new { id = "option_yes" }) %>
</p>

<p>
    <label for="option_no">Np:</label>
    <%=Html.RadioButton("option", "no", new { id = "option_no" }) %>
</p>

I would recommend the latter, and it seems to be the one you are asking for too.

EDIT

In fact you should give the argument with the ID attribute no matter what. If you don’t do this, your site will have multiple elements with the same ID, and this fails HTML validation.