The ideal of 'Welfare State' in the Indian Constitution is enshrined in its

The Directive Principles of State Policy (DPSP) are correct because Article 38 explicitly mandates the State to secure a social order for the promotion of the welfare of the people. While the Preamble is a tempting choice as it mentions "Justice" and "Equality," it only outlines the vision, whereas the DPSP provides the substantive framework and specific instructions for the State to act as a welfare state. This question tests the core concept of the socio-economic philosophy of the Indian Constitution and the functional difference between constitutional objectives and mandates.