The correct answer is: District Collector.
The District Collector is the administrative head of a district in Haryana. He/She is appointed by the State Government and is responsible for the overall administration of the district. The District Collector is also the District Magistrate and is responsible for maintaining law and order in the district.
The Mayor is the head of the municipal corporation in a city. The MLA is the elected representative of a constituency in the State Legislative Assembly. The Sarpanch is the elected head of a village panchayat.
The District Collector is a more senior position than the Mayor, MLA, or Sarpanch. The District Collector is responsible for the administration of the entire district, while the Mayor, MLA, and Sarpanch are responsible for the administration of a city, constituency, or village, respectively.