Identify the earliest indigenous literary source for Sri Lankan history, the name Ptolemy used for Sri Lanka, a form of inscription, and the king known for early irrigation works.

Here are the answers to the questions: Question 1: The earliest indigenous literary source that helps to understand the history of Sri Lanka is the Dipavamsa. (3) தீபவம்சம் Question 2: Claudius Ptolemy referred to Sri Lanka as Taprobane in his world map. (2) தப்ரோபேன் Question 3: Among the given options, a copper plate is a form of inscription (Saasana). (1) செப்புத் தகடு Question 4: King Pandukabhaya is known for his early irrigation works, including the construction of tanks. While the specific details of the Tissamaharama tank and Kirindi Oya in the late