The correct option is D Sadat Ullah khan
Raja Desingh was killed by Sadat Ullah khan. Sadat Ullah khan was Nawab of Carnatic and founder of Nawayath dynasty. After the death of Aurungazeb, due to the inability of his successor, the control of Delhi became weak. Saadatullah Khan adopted his brother Ghulam Ali Khan's son Dost Ali Khan as his own and nominated him as successor as he was without children. Raja Desingh was a king of the Bundela Rajput who ruled Gingee in 1714 CE.