= f.collection_radio_buttons :answer_ids, @question.answers, :id
= f.collection_radio_buttons :answer_ids, @question.answers, :id, sanitize(:text, tags: %w(sub sup))
<sub>
<sup>
<%= f.collection_radio_buttons :name, [[true, 'H<sub>2</sub>O'] ,[false, 'SO<sub>2</sub>']], :first, :last do |b| %>
<%= b.label {b.radio_button + sanitize(b.text, tags: %w(sub sup))}%>
<%end%>