The Directive Principles of State Policy (DPSP), enshrined in Part IV of the Constitution of India, are guidelines for the central and state governments to follow while forming laws and policies. They aim to establish a welfare state.
The $73^{rd}$ Amendment Act of 1992 was a landmark legislation in India that significantly reformed the rural local self-government system. It aimed to give constitutional status to Panchayati Raj institutions (PRIs).
Let's examine the Articles mentioned in the options in the context of DPSPs:
The core objective of the $73^{rd}$ Amendment Act of 1992 was to establish a uniform system of Panchayati Raj across the country and empower village panchayats as institutions of self-governance. This aligns perfectly with the directive stated in Article 40 of the Constitution.
While DPSPs are non-justiciable (cannot be enforced by courts), the $73^{rd}$ Amendment gave a constitutional mandate to the principles laid down in Article 40, making local self-government a reality and strengthening rural democracy in India.
The other Articles (42, 44, 46) deal with different aspects of state policy and were not the primary focus of the $73^{rd}$ Amendment.
Therefore, Article 40, concerning the organisation of village panchayats, is the Directive Principle of State Policy that was specifically given effect and constitutional backing through the $73^{rd}$ Amendment of 1992.
Article ___________ of the Constitution directs every state to provide adequate facilities for instruction in the mother-tongue at the primary stage of education of children belonging to linguistic minority groups.