Which of the following statements is true?

In Australia, when a company buys back its shares, those repurchased shares are always cancelled

In Australia, a company may own shares in itself

When a company buys back its shares, the only equity account which the accounting standards permit to be decreased is the share capital account

In Australia, when a company buys back its shares, it does not have to cancel them if it transfers them to a trust for the benefit of their employees