Step 1: Understanding the Constitutional Provision.
The Supreme Court of India is the apex judicial authority, and its establishment, structure, and functioning are provided under Part V of the Constitution, which deals with the Union Government.
Step 2: Identifying the Correct Article.
Article 124 specifically provides for the establishment and constitution of the Supreme Court. It mentions the appointment of the Chief Justice of India and other judges, along with related procedures.
Step 3: Analysis of Options.
(B) Article 125 deals with salaries and allowances of Supreme Court judges.
(C) Article 126 provides for the appointment of an Acting Chief Justice.
(D) Article 127 deals with the appointment of ad hoc judges when required.
Step 4: Conclusion.
Thus, the establishment of the Supreme Court is provided under Article 124 of the Constitution.