The correct options are
A Musiri
B Korkai
C Uraiyur
D Karuvar
Apart from Kanchi, Madurai and Poompuhar, other towns like Korkai, Vanchi, Thondi, Uraiyur, Musiri, Karuvar, Mamallapuram, Thanjai, Thagadoor and Kaayal were also a part of Tamilagam. Most of these cities were also ports or commercial towns.