The correct answer is (d), Directive Principles of State Policy.
The Directive Principles of State Policy are a set of principles that are enshrined in the Indian Constitution. They are not enforceable in a court of law, but the government is supposed to follow them while making laws and policies. The Directive Principles were borrowed from the Irish Constitution, which also has a similar set of principles.
The Directive Principles are intended to guide the government in making laws and policies that will promote the welfare of the people. They cover a wide range of issues, including economic and social justice, education, health, and environment. The Directive Principles are a reminder that the government has a responsibility to ensure the well-being of its citizens.
The other options are incorrect. The post of Prime Minister is an executive position that is not mentioned in the Irish Constitution. Fundamental Duties are a set of duties that are imposed on citizens by the Indian Constitution. They are not enforceable in a court of law, but citizens are expected to follow them. Fundamental Rights are a set of rights that are guaranteed to citizens by the Indian Constitution. They are enforceable in a court of law.