The correct answer is: b) Chairperson.
The Chairperson is the elected head of the Zilla Parishad (District Council). The Zilla Parishad is a local government body in India that is responsible for the development of the district. The Chairperson is elected by the members of the Zilla Parishad. The Chairperson is responsible for the day-to-day functioning of the Zilla Parishad and for ensuring that the decisions of the Zilla Parishad are implemented.
The Collector is a government official who is responsible for the administration of a district. The Collector is appointed by the state government. The Collector is responsible for the maintenance of law and order, the collection of taxes, and the implementation of government schemes.
The Sarpanch is the elected head of a gram panchayat, which is the lowest level of government in India. The Sarpanch is elected by the members of the gram panchayat. The Sarpanch is responsible for the day-to-day functioning of the gram panchayat and for ensuring that the decisions of the gram panchayat are implemented.
The Block Development Officer is a government official who is responsible for the development of a block. A block is a group of villages. The Block Development Officer is appointed by the state government. The Block Development Officer is responsible for the implementation of government schemes in the block.