How many of the given pairs of Literary Work and their Authors are correctly matched?

The correct answer is only two.

Pair 1 is not accurately matched: Devi-Chandraguptam is a Sanskrit drama penned by Vishakhadeva (or Vishakhadatta). The narrative revolves around the Gupta king Ramagupta, who contemplates surrendering his queen, Dhruvadevi, to a Shaka invader. In a twist of fate, his younger brother Chandragupta disguises himself as the queen and infiltrates the enemy camp to eliminate the foe.

Pair 2 is correctly matched: The Hammira Mahakavya is a notable 15th-century Sanskrit epic poem authored by the Jain scholar Nayachandra Suri. It recounts the legendary life of Hammira, a Chahamana king from the 13th century.

Pair 3 is incorrectly matched: The Milinda Pañha, also referred to as the Questions of King Milinda or The Debate of King Milinda, is a prominent Pali Buddhist text attributed to Nagasena. It forms part of the Theravada Buddhist canon and features a dialogue between the Indo-Greek king Menander I (known as Milinda in Pali) and the Buddhist monk Nagasena.

Pair 4 is correctly matched: Somadeva Suri, a 10th-century CE Jain monk from South India, authored the Nitivakyamrtam, also known as the Nectar of the Science of Polity, which serves as a comprehensive guide on statecraft. Notably, the text of Nitivakyamrtam also references Somadeva’s earlier work, the Yashastilaka.