skill-assessment-app/app/views/quiz/_radio.html.erb

<% question.input_options.each do | option |
    option_id = "#{option.parameterize}_#{question.to_i}"
    radio_html = {class: 'radio', id: option_id, data: {last: (question.answer == option) ? 'checked' : '' }}
    answers = answer.try(:answer) || answer
  %>
    <div class="form-group-multiples">
      <%= radio_button_tag('answer[radio]', option, (question.answer == option), radio_html) %>
      <%= label_tag(option_id, option) %>
    </div>
<% end %>

<%= render partial: "quiz/answer_errors", locals: {question: question, answer: answer} %>