app/views/contents/_question.html.haml
#flash
#questions
%h3= question.title
= simple_form_for [question, attempt], remote: true do |f|
= f.input :question_id, as: :hidden
= f.input :attemptable_id, input_html: {value: params['topic_id']}, as: :hidden
= f.input :option_id, as: :radio_buttons, collection: question.options.collect{|opt| [opt.text, opt.id]}
= f.submit 'Take Test', class: 'btn btn-primary'