The earliest surviving rock-cut cave architecture in ancient India was constructed during which historical period?

The correct answer is Mauryan Period.

Detailed Explanation:
The earliest surviving rock-cut cave architecture in ancient India was constructed during the Mauryan Period in the 3rd century BCE.

Key historical highlights include:
• Barabar and Nagarjuni Caves: Located in the Jehanabad district of Bihar, India, these caves represent the oldest extant rock-cut architectural traditions in India.
• Patronage: These caves were excavated during the reign of the Mauryan Emperor Ashoka (reigned c. 268–232 BCE) and his grandson Dasharatha Maurya, primarily as shelters for ascetics belonging to the Ajivika sect.
• Architectural Significance: The caves are famous for their highly polished inner granite surfaces, known as the signature "Mauryan polish", as well as intricate carved stone entryways—most notably the entrance of the Lomas Rishi Cave, which mimicked contemporary timber structure aesthetics and served as a prototype for later Buddhist Chaitya halls at sites like Ajanta and Karla.