Explanation : 

I. Separation of Judiciary from the Executive in the public services of the State : The Directive Principles of the State Policy

• Article 50 of the Indian Constitution states: “The State shall take steps to separate the judiciary from the executive in the public services of the State.”
• This Article falls under Part IV of the Constitution, which deals with the Directive Principles of State Policy (DPSP).
• Therefore, this pair is correctly matched.

II. Valuing and preserving of the rich heritage of our composite culture : The Fundamental Duties

• Article 51A(f) of the Indian Constitution, which lists the Fundamental Duties, states that it shall be the duty of every citizen “to value and preserve the rich heritage of our composite culture.”
• Fundamental Duties are enshrined in Part IV-A of the Constitution.
• Therefore, this pair is correctly matched.

III. Prohibition of employment of children below the age of 14 years in factories : The Fundamental Rights

• Article 24 of the Indian Constitution states: “No child below the age of fourteen years shall be employed to work in any factory or mine or engaged in any other hazardous employment.”
• Article 24 is part of Part III of the Constitution, which deals with Fundamental Rights (specifically, the Right Against Exploitation).
• Therefore, this pair is correctly matched.

Conclusion: All three pairs are correctly matched.

Final answer: All the three