Select the best option:

<%= form.collection_radio_buttons(:answer, question.input_options, :to_s, :to_s, {}, {class: ""}) do | option | %> <% option_id = "#{question.question_id}#{sanitize_to_id(option.value)}" checked = answer_string == option.value ? 'checked' : '' %>

<%= option.radio_button( id: option_id, checked: checked, data: { last: checked } ) %> <%= option.label(for: option_id) %>

<% end %>