Which one of the following pairs of authors and Sanskrit literary works is not correctly matched?

The pair Kalidasa: Vasavadatta is incorrectly matched. Vasavadatta is a famous Sanskrit prose romance (akhyayika) written by the poet Subandhu, not Kalidasa. Subandhu is often grouped with other great prose masters like Dandin and Bana. Kalidasa is renowned for works such as Shakuntalam, Meghaduta, and Vikramorvashiya. The other pairs are correct: Somadeva authored the Kathasaritsagara, an 11th-century collection of legends and folk tales compiled for Queen Suryamati of Kashmir. Ashvaghosha, a contemporary of Kanishka, wrote the Buddhacharita, a celebrated biography of the Buddha. Bilhana is the author of the Vikramankadeva-charita, a historical kavya. Therefore, while Somadeva, Ashvaghosha, and Bilhana are correctly linked to their respective masterpieces, Kalidasa is not the author of Vasavadatta.