Concept:Belum Caves are a well-known natural limestone cave system located in Andhra Pradesh. Their district location is a common board exam question.
Explanation:Belum Caves are found in Belum village, Kolimigundla mandal, Kurnool district, Andhra Pradesh.
The caves stretch 3229 metres, making them the second‑largest natural caves in the Indian subcontinent.
They feature long passages, spacious chambers, freshwater galleries, and syphons.
The deepest point, Patalganaga, is 120 ft below the entrance.
The name comes from the Sanskrit word “Bilum” meaning cave; in Telugu they are called Belum Guhalu.
Other districts mentioned are incorrect: Chittoor is not the location; Kadapa (now YSR district) is centrally located in Rayalaseema but does not contain Belum Caves; Srikakulam is a north‑eastern district with different rivers but not the site of these caves.
Answer:Kurnool (Option D).