"Which of the following is NOT a responsibility of the Stock Exchange?" "A. Regulating foreign exchange markets" is ActEd's answer. However, if my understanding and memory of some old ActEd notes is correct, companies that are quoted but not listed on the stock exchange (i.e. those on AIM) only have to publish their accounts annually. So... "D. Ensuring that quoted companies publish 6-monthly accounts" ...is also correct!
accounts You may be right. I am not sure about the accounting requirements of AIM. When we wrote stock exchange we probably thought about the main exchange only.