Explanation:

- Option 1, Shah Jahan: He was Aurangzeb's father and remained imprisoned during Aurangzeb's quest for the throne.

- Option 2, Shah Shuja: This brother of Aurangzeb was a contender for the throne but was not involved in the Battle of Deorai.

- Option 3, Dara Shikoh: Aurangzeb's eldest brother and primary rival for the Mughal throne. Dara Shikoh was indeed defeated by Aurangzeb in the Battle of Deorai in 1659.

- Option 4, Murad Baksh: Another brother who allied with Aurangzeb initially but was later captured by Aurangzeb.

Correct Answer: Option 3, Dara Shikoh