The correct option is C Muhammad bin Tughlaq
The ruler of Delhi Sultanate when Daulatabad became an independent kingdom was Muhammad bin Tughlaq. Muhammad bin Tughlaq was the Sultan of Delhi from 1325 to 1351. After the death of his father Ghiyasuddin Tughlaq, Muhammad bin Tughlaq ascended the throne of Tughlaq dynasty of Delhi in February. He was the eldest son of GhiyasudDin Tughlaq, the founder of the Tughluq dynasty. Muhammad bin Tughlaq was the founder of the Tughluq dynasty after taking control of the Delhi Sultanate.