Solution:А. Рushyamitra → II. Killed Brihadratha: Pushyamitra Shunga, commander-in-chief of the Mauryas, killed the last Maurya ruler Brihadratha in 185 BCE and founded the Shunga dynasty.
B. Devabhuti → I. Last Shunga ruler: Devabhuti was indeed the last ruler of the Shunga dynasty. He was assassinated by his minister Vasudeva Kanva, who started the Kanva dynasty.
C. Dhana→ IV. Ayodhya stone inscriptions: Dhana (or Dhanadeva), a ruler of Kosala, is mentioned in the Ayodhya inscription, which also records Pushyamitra Shunga's performance of the Ashvamedha sacrifice.
D. Mitras → III. Dislodged by the Shakas: The Mitra rulers (Kosala/Kausambi region) were eventually dislodged with the rise of the Shakas (Western Satraps), and later the Kushanas.
Thus, the correct sequence is:
A-II, B-I, C-IV, D-III.