The correct answer is option 1: Part-IV. Part-IV of the Constitution of India deals with Directive Principles of State Policy.

The provision mentioned in the question refers to Article 50 of the Constitution, which is a part of the Directive Principles of State Policy. Directive Principles of State Policy are guidelines given to the government to promote social and economic conditions in society. They are not enforceable in court but are considered fundamental in the governance of the country.

Article 50 specifically states that "the State shall take steps to separate the Judiciary from the Executive in the public services of the State." This provision emphasizes the importance of maintaining the independence and separation of powers between the judiciary and the executive branch of the government.

In summary, the provision mentioned in the question is incorporated in Part-IV of the Constitution of India, which deals with Directive Principles of State Policy.