The correct option is B Patanjali
Dandin was a versatile writer. Dash Kumar Charita is his most notable work. The story follows the adventure of 10 princes. Subandhu, another writer, contributed with his work, Vasavadatta. This story revolves around heroine Vasavadatta and the prince Kandarpaketu. As Sanskrit had become very popular during this age, the grammar involved was also systematised. This was carried out by Grammarians such as Panini and Patanjali. Mahabashya is a notable work by Patanjali. Amar Singh who was a lexicographer whose work Amarkosha is celebrated till date.