Statement 1 is correct. The 42nd Amendment Act, 1976, added the words 'Socialist', 'Secular', and 'Integrity' to the Preamble. Statement 2 is incorrect. The 42nd Amendment added 10 Fundamental Duties to the Constitution (Part IVA, Article 51A), based on the recommendations of the Swaran Singh Committee. Statement 3 is incorrect. The 42nd Amendment added Articles 39A (Free legal aid), 43A (Participation of workers in management), and 48A (Protection of environment) as new Directive Principles. Article 47 (Duty of the State to raise the level of nutrition and standard of living and to improve public health) was part of the original Constitution.