Which Act is the Australian Constitution based on?

• The Commonwealth of Australia Act 1901
• The Australian Independence Act 1901
• The Australian Government Act 1900
• The Commonwealth of Australia Constitution Act 1900
  Explanation:

  "The Australian Constitution is based on the Commonwealth of Australia Constitution Act 1900 (UK). This Act was passed by the British Parliament and came into effect on 1 January 1901, establishing the framework for Australia's federal system of government."