Which of the following programmes/ schemes/acts implements the provision of Directive Principles of State Policy under Part IV of the constitution?
1. Maternity Benefit Act, 1961
2. Legal Services Authorities Act, 1987
3. The Wildlife (Protection) Act, 1972
4. 73rd Constitutional Amendment Act
5. Scheduled Castes and Scheduled Tribes (Prevention of Atrocities) Act, 1989
Select the correct answer using the codes given below: