With reference to the period of Gupta dynasty in ancient India, the towns Ghantasala, Kadura and Chaul were well known as
Correct Answer A. ports handling foreign trade
Explanation
During the Gupta period, maritime commerce thrived across both the western and eastern seaboards of India:
– On the eastern coast (Andhra and Bengal), Ghantasala (Ghantashala) and Kadura (along with Tamralipti) functioned as bustling maritime ports handling overseas trade with Southeast Asia (Suvarnabhumi), Sri Lanka, and China.
– On the western coast (Maharashtra and Gujarat), Chaul (along with Broach/Bharuch and Kalyan) handled maritime trade with the Persian Gulf, Arabia, and the Mediterranean Roman world.
Hence, these ancient urban settlements were well known as ports handling foreign trade — Option A.