Option a is the correct answer. The dynasty that is not mentioned in Sangam literature is Kadamb. Sangam literature mentions three major dynasties that ruled over the Tamil region, namely the Chera, Chola, and Pandya. These dynasties are also known as the Three Crowned Kings or the Tamil Moovendhar. They had their capitals at Vanji, Uraiyur, and Madurai respectively. They patronized the poets and bards who composed the Sangam works and participated in the Sangam assemblies or academies. Important Tips Kadamb dynasty: The Kadamb dynasty was a royal family that ruled over parts of Karnataka and Goa from the 4th to the 6th century CE. They were founded by Mayurasharma, who rebelled against the Pallava rule and established his own kingdom. They were known for their architecture, art, literature, and administration. They were later conquered by the Chalukyas and Rashtrakutas.