The correct option is The Presiding Officer.
Explanation
In the Indian Parliamentary system, the authority to regulate the internal business and procedure of the House is vested exclusively in the Presiding Officer.
- Authority of the Presiding Officer: The Presiding Officer (the Speaker in the Lok Sabha and the Chairman in the Rajya Sabha) is the final authority regarding the regulation of business and procedure within the House. They are the final interpreter of:
- The Constitution of India (within the House),
- The Rules of Procedure and Conduct of Business, and
- Parliamentary precedents.
- Judicial Non-Interference: Under Article 122 of the Constitution, the validity of any proceedings in Parliament cannot be called into question on the ground of any alleged irregularity of procedure. This reinforces the Presiding Officer's final authority in these matters.
- Role of Other Functionaries:
- The Prime Minister is the head of the government and typically the Leader of the House, but does not regulate the procedure or enforce rules during sessions.
- The President summons and prorogues the House but does not preside over its sittings or regulate its internal conduct.
- The Leader of the Opposition provides constructive criticism and represents the minority view but lacks the authority to regulate House business.
Key Takeaway: The Presiding Officer is the custodian of the House, and their ruling on matters of procedure and the conduct of business is final and binding.