Step 1: Understanding Gram Panchayat system.
The head of a village-level self-government institution (Gram Panchayat) is called the Sarpanch. The village court, also known as Nyaya Panchayat, is headed by the Sarpanch.
Step 2: Analyzing the options.
(A) Panch: Refers to members of the Panchayat, not the head.
(B) Sarpanch: Correct — the elected head of the Gram Panchayat.
(C) Mayor: Head of a Municipal Corporation, not a village.
(D) Nyaya Mitra: Not the official head of a village court.
Step 3: Conclusion.
The correct answer is (B) Sarpanch, who acts as the head of the village court.