Answer & ExplanationAnswer: [C]
In Gupta period, Indian ports always maintained relations with Sri Lanka, Persia, Arabia, Ethiopia, the Byzantine Empire, China and the islands of the Indian Ocean. Sri Lanka was an important port both in the foreign trade of the island and in the inter-oceanic commerce between the East and the West. The volume of external trade of India with China greatly increased during the Gupta period. Chinasunka a Chinese silk, had a good market in India.