Which principle among the following was added to the Directive Principles of State Policy by the 42nd Amendment to the Constitution?

1. The 42nd Amendment Act, 1976, added four new Directive Principles of State Policy (DPSP) to the original list. 2. Option (A) Equal pay for equal work for both men and women is part of Article 39(d), which was present in the original Constitution. 3. Option (B) Participation of workers in the management of industries was added as Article 43A by the 42nd Amendment. 4. Option (C) The Right to work, education and public assistance in certain cases is mentioned in Article 41, which was part of the original Constitution. 5. Option (D) Securing living wage and human conditions of work to workers is part of Article 43, which was also present in the original Constitution. 6. Other DPSPs added by the 42nd Amendment include Article 39(f) (opportunities for healthy development of children), Article 39A (equal justice and free legal aid), and Article 48A (protection and improvement of environment and safeguarding of forests and wildlife). 7. Therefore, the principle of Participation of workers in the management of industries was added by the 42nd Amendment.