The correct option is D Guru Hargobind Singh Ji created the Khalsa to defend Sikhism.
Guru Gobind Singh Ji started the Khalsa, a brotherhood of Sikhs to oppose cruelty and oppression. Guru Hargobind Singh militarised the Sikhs and constructed the Akal Takht after the martyrdom of his father and fifth Sikh Guru. He decided to protect his fellow Sikhs by adding two swords, Miri and Piri to his attire. Miri denoted temporal power, whereas Piri denoted spiritual power.