The correct answer is A) Sarpanch.
A Sarpanch is the head of a Gram Panchayat in Karnataka. The Gram Panchayat is the smallest unit of local self-government in India. It is responsible for the development and welfare of the village. The Sarpanch is elected by the people of the village. He/She is the chief executive of the Gram Panchayat and is responsible for its day-to-day functioning. The Sarpanch is assisted by a Panchayat Secretary and a Panchayat Development Officer.
The other options are incorrect.
B) Pradhan is the head of a Gram Panchayat in Uttar Pradesh.
C) Chairperson is the head of a Municipal Corporation in India.
D) Block Development Officer is an officer of the Indian Administrative Service who is responsible for the development of a block.