The Dashakumaracharita or Tales of Ten Princes` is a famous Sanskrit poem that was composed by Dandin. Dandin was a renowned Indian poet and scholar who lived during the 7th century AD.

Option 1: Bhatti - This is incorrect. Bhatti was a different poet known for his work called Bhattikavya, which is a long epic poem.

Option 2: Banabhatta - This is incorrect. Banabhatta was another famous poet and author, known for his works like Kadambari and Harshacharita.

Option 3: Bhasa - This is incorrect. Bhasa was an ancient Indian playwright, known for his dramatic plays like Svapnavasavadatta and Urubhangam.

Option 4: Dandin - This is the correct answer. Dandin was the poet who composed the Dashakumaracharita. This work is a collection of stories that revolve around the adventures and misadventures of ten princes.

In conclusion, the Dashakumaracharita was composed by Dandin, not Bhatti, Banabhatta, or Bhasa.