The Sikh military sect 'the Khalsa' was introduced by

Answer: Option C

Khalsa (Punjabi: "the pure") refers to both a special group of initiated Sikh warriors, as well as a community that considers Sikhism as its faith. The Khalsa tradition was initiated in 1699 by the last living Guru of Sikhism, Guru Gobind Singh. Its formation was a key event in the history of Sikhism.