Explanation:

Statement 1: Sometimes called Tiruttontarpuranam, the Purana of the Holy Devotees, is a Tamil poetic account depicting the legendary lives of the sixty-three Nayanars, the canonical poets of Tamil Shaivism.
Statement 2: Jayankondar’s Kalingattupparani describes the Kalinga war fought by Kulotunga I.
Statement 3: Ottakoothar (another name) was a Tamil court poet to three legendary early Chola kings, namely Vikrama Chola, Kulotunga II and Rajaraja II.
Statement 4: The works on Tamil grammar like Kalladam by Kalladanar, Yapperungalam by Amirthasagarar, a Jain, Nannul by Pavanandhi and Virasoliyam by Buddhamitra were the products of the Chola age