Multiple choice Which Amendment Act introduced changes in the preamble to the Indian Constitution? The 38th Amendment Act, 1975 The 40th Amendment Act, 1976 The 42nd Amendment Act, 1976 The 44th Amendment Act, 1979 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The 42nd Amendment Act of 1976 is the only amendment to have changed the Preamble, adding the words Socialist, Secular, and Integrity.