Which of the following constitutional Amendment is known as "Mini constitution"-

42nd Amendment Act which was passed in 1976 during the Prime Minsterahip of Indira Gandhi is also known as Mini Constitution. It was the most comprehensive amendment carried out so far and made fundamental changes in the constitutional structure. It made changes in Preamble, incorporated Fundamental Duties, asserted primacy of Directive Principles over Fundamental Rights, provided for administrative tribunal etc.