The correct answer is Sisupalgarh.

• Sisupalgarh-
  • Sisupalgarh or Sisupalagada is situated in Khurda District in Odisha, India and houses ruined fortifications.
  • It used to be the capital of ancient Kalinga.
  • It is one of the largest and best-preserved early historic fortifications in India, with the earliest occupation both inside and outside the later site´s northern rampart around the 7th to 6th centuries BCE.
  • In Orissa, we will find the cave architecture of the pre-historic times in Sisupalgarh.

• Important Rock Cut Caves-
  • Udayagiri and Khandagiri Caves, Odisha:
    • They were made under the Kalinga King Kharavela in 1st-2nd century BC near modern-day Bhubaneswar.
    • The cave complex has both man-made and natural caves possibly carved out for the residence of Jain monks.
    • There are 18 caves in Udayagiri and 15 in Khandagiri.
    • Udayagiri caves are famous for the Hathigumpha inscription which is carved out in Brahmi script.
  • Sittanavasal Caves (Arivar Koil):
    • Located 16 km northwest of Pudukkottai town in Tamil Nadu, these famous rock-cut caves are known for the paintings in the Jain temples.
  • Jogimara Cave:
    • It is an artificially carved out cave located in the Surguja district of Chhattisgarh.
    • It is dated back around 1000-300 BC and has a few paintings and inscriptions of a love story in Brahmi script.
    • The cave is said to be an attachment to an amphitheatre and paintings were made to decorate the room.
  • Nasik Caves:
    • It is a group of 24 Buddhist caves (Hinayana Period), also known as “Pandav Leni”, developed during the 1st century A.D.
    • These caves belong to the Hinayana period. However, later, the influence of the Mahayana period can also be found in these caves.
    • The idols of Buddha were also carved inside these caves representing the influence of Mahayana Buddhism.