The correct option is Subordinate Courts.
Explanation
The Constitution of India establishes a single, integrated judicial system organized in a pyramidal structure. This hierarchy ensures uniformity in the administration of justice across the country.
Structural Analysis:
- Apex: The Supreme Court of India stands at the top of the judicial pyramid.
- Middle Level: High Courts function below the Supreme Court, serving as the highest judicial authorities at the state level.
- Base: The Subordinate Courts constitute the base of this structure. They function below and under the supervision of the High Courts.
Justification for Subordinate Courts:
The term "Subordinate Courts" is the constitutional classification (Part VI, Chapter VI) for the entire tier of the judiciary below the High Court. This includes District Courts, Sessions Courts, Courts of the Civil Judge, and Judicial Magistrate Courts. While District Courts (Option c) are part of this tier, they represent only the highest level within the subordinate judiciary. The term "Subordinate Courts" comprehensively covers the entire base of the judicial hierarchy.
Key Takeaway:
The Indian judiciary is structured hierarchically with the Supreme Court at the summit, High Courts in the middle, and Subordinate Courts forming the broad base.