In the functioning of Gram Sabha under the Panchayati Raj system, the authority to preside over its meetings vests in:

The correct option is

The Panchayat President

Explanation

The Gram Sabha is the foundational body of the Panchayati Raj system, comprising all persons registered in the electoral rolls of a village within the Panchayat area. It functions as a village assembly with powers and functions determined by the State Legislature.

Detailed Analysis:
While the 73rd Constitutional Amendment Act, 1992, establishes the Gram Sabha, the specific procedural rules regarding its meetings are defined by respective State Panchayati Raj Acts. Across these acts, the standard provision regarding the presiding authority is as follows:

• The Panchayat President (Sarpanch/Mukhiya): The elected head of the Gram Panchayat is the designated authority to convene and preside over the meetings of the Gram Sabha.
• The Panchayat Secretary: This official is appointed by the government (not elected). Their role is administrative, involving the recording of minutes and maintaining records, but they do not preside over the meeting.
• The District Collector: The Collector is the administrative head of the district and does not preside over the local village assembly meetings.

Key Takeaway:
The meetings of the Gram Sabha are presided over by the Chairperson of the Gram Panchayat (commonly known as the Sarpanch or President), or in their absence, by the Vice-Chairperson.