Which of the following was not written in Sanskrit language?

The correct answer is Option (3) → Silappadikaram

The Silappadikaram is an epic written in Tamil. One of its passages describes the Pandya chief Senguttuvan’s visit to the forest, where people came down the mountain singing and dancing, bringing gifts such as ivory and fragrant wood.

The other three are Sanskrit compositions. The Prayaga Prashasti (Allahabad Pillar Inscription) was composed by Harishena, the court poet of Samudragupta; the Harshacharita, a biography of Harshavardhana, by his court poet Banabhatta; and the rock inscription at Girnar on the Sudarshana lake was written to record the achievements of the Shaka ruler Rudradaman.

NCERT (2025-26): “4.2 Divine kings … The Prayaga Prashasti (also known as the Allahabad Pillar Inscription) composed in Sanskrit by Harishena, the court poet of Samudragupta, arguably the most powerful of the Gupta rulers (c. fourth century CE), is a case in point.…”