The Directive Principles of State Policy (DPSP), enshrined in Part IV (Articles 36-51) of the Indian Constitution, are non-justiciable, meaning they cannot be enforced by courts like Fundamental Rights. However, they serve as guiding principles for the government in policy-making and law-making, aiming to establish social and economic justice and promote the welfare of the people.

While DPSPs do not directly limit the legislative or executive functions, they act as constitutional directives that governments must consider when framing laws and policies. The Supreme Court has often harmonized Fundamental Rights and DPSPs to ensure a balanced constitutional interpretation, recognizing that DPSPs are fundamental to the governance of the country.

Hence, the correct answer is option (D) neither 1 nor 2.