Option b is the correct answer. Tirugyan or Thirugnana sambanthar was a young Saiva poet-saint (not Alvar), who lived in the seventh century CE. He is one of the most prominent saints amongst the 63 Nayanmars. His entire collection of hymns about Lord Shiva is called "Thirukkadaikappu". Important Tips Alvars: Alvars were devoted to Lord Vishnu and his avatars. The hymns of the Alvars were made into a consolidated volume known as Divya Prabandha. Pudum, Poyagai, Thirumangai , Thirumazhisai, Thiruppaan, Nammalwar, and Kulasekara are Alvar saints. Andal was the famous woman saint among the Alvars. Nayanars: Nayanars were devoted to Lord Shiva and his avatars. Nayanars were active around the 6th-8th Century AD. The high priest of Raja Raja Chola I, Nambiyandar Nambi, compiled the hymns into a series of volumes called the Tirumurai. The Nayanars were from various backgrounds, including Brahmins, Harijan, and nobles. Tiru Neelakanta, Meiporul, Viralminda, Tirugyan, Amaraneedi, and Eripatha are Naynar saints