The correct answer is: a) Kurnool.
Kurnool district is located in the southern part of Andhra Pradesh, India. It is one of the oldest districts in the state, and is known for its rich history and culture. The district is also home to a number of important archaeological sites, including the Acheulian (Lower Paleolithic) sites of Attirampakkam and Bhimavaram.
The Acheulian culture is a prehistoric culture that dates back to the Lower Paleolithic period. It is characterized by the use of stone tools, which were made by chipping and flaking stone. The Acheulian culture was widespread in Africa, Europe, and Asia, and it is thought to have originated in Africa.
The Acheulian sites in Kurnool district are some of the most important sites of this culture in India. The sites have yielded a number of stone tools, as well as fossils of animals that lived in the area during the Lower Paleolithic period. The sites provide important insights into the lives of early humans, and they are a valuable resource for archaeologists.
The other options are incorrect because they are not districts in Andhra Pradesh.