The verified answer to “Important Battles question: The Battle of Deorai (1659) was the final defeat of which Mughal prince by Aurangzeb?” is Dara Shikoh, option C. The source-backed, question-specific record explains: The Battle of Deorai (April 14 1659) near Ajmer was the final defeat of Dara Shikoh by Aurangzeb. Dara fled to Sindh and then to Afghanistan but was betrayed and captured. He was executed in Delhi in September 1659. This evidence establishes the historical relationship required in this Important Battles item. A correct solution must preserve the exact battle, date, participants, commander, location, outcome or significance requested by the stem. Similar periods, genres or national traditions do not make two battle facts interchangeable. Option C gives Dara Shikoh and satisfies every condition stated in the question. The remaining choices—Murad Bakhsh, Shah Shuja and Suleiman Shikoh—do not satisfy the complete requirement. The reliable checking method is to identify the named battle first, recall or verify its verified participant or outcome, and then read qualifiers such as “both works,” “original language,” “first published,” “correctly matched” or “incorrectly matched.” These qualifiers determine what counts as the answer. Replaying that method for this Important Battles question confirms Dara Shikoh without relying on option position.