The correct option is C Aurangzeb
In September 1657 CE, when Shah Jahan fell ill, an immediate struggle for succession started between his four sons, Dara Shikoh, Shah Shuja, Aurangzeb, and Murad Bakhsh.
The victor was Aurangzeb, who declared himself emperor in 1658 CE and strictly confined Shah Jahan in the Agra Fort for life.