The correct answer is (d). Gobind Singh founded the Khalsa in 1699. The Khalsa is a community of Sikhs who have taken the five Ks, which are articles of faith that identify them as Sikhs. The five Ks are:
- Kesh: uncut hair
- Kangha: a wooden comb
- Kara: a steel bracelet
- Kachera: cotton shorts
- Kirpan: a sword
The Khalsa was founded in response to the persecution of Sikhs by the Mughal Empire. Gobind Singh believed that the Khalsa would be a force for good in the world and would help to protect the Sikh faith.
Har Rai (a) was the seventh Sikh Guru. He was a peaceful and spiritual leader who focused on spreading the message of Sikhism.
Har Kishan (b) was the eighth Sikh Guru. He was a child prodigy who became Guru at the age of five. He is remembered for his miracles and his love of children.
Teg Bahadur (c) was the ninth Sikh Guru. He was a brave and courageous warrior who fought against the Mughal Empire. He was executed by the Mughals in 1675.