With reference to ancient South India, Korkai, Poompuhar and Muchiri were well known as

Answer: B. Korkai, Poompuhar and Muchiri were well known as PORTS. In Sangam-age South India (c. 300 BCE - 300 CE), these three were major coastal trading ports: KORKAI was the chief port of the Pandya kingdom on the southern Tamil coast, famous for pearl-fishing and trade with Greco-Roman world. Greek writers called it Kolchoi. POOMPUHAR (also called Kaveripattinam, Puhar) was the great port-capital of the Chola kingdom at the mouth of the Kaveri river. It was the setting of the Tamil epic Manimekalai. MUCHIRI (Muziris, modern Pattanam in Kerala) was the principal port of the Cheras, dominating the pepper trade with Rome. Roman amphorae and gold coins found at Pattanam confirm this. The three together represent the three great Tamil kingdoms (Pandya, Chola, Chera) and their access to international maritime trade with Rome, Egypt and Southeast Asia. Source: NCERT Class 12 Themes in Indian History Part I / Sangam literature studies.