Final answer:
B) It served as the primary residence of Guru Gobind Singh Ji.
Kesgarh Saheb is significant because it was where the Khalsa Panth was created, marking the establishment of the Sikh identity and formation of the Khalsa. It was not the primary residence of Guru Gobind Singh Ji, the location of the first Guru Granth Sahib compilation, or the place where the Anand Karaj ceremony was established.
Step-by-step explanation:
The significance of Kesgarh Saheb, one of the 5 Takhts, is that it was where the Khalsa Panth was created on Vaisakhi of 1699 A.D. by Guru Gobind Singh Ji. This event marked the formal establishment of the Sikh identity and the formation of the Khalsa, a military brotherhood of initiated Sikhs.
However, Kesgarh Saheb did not serve as the primary residence of Guru Gobind Singh Ji. The primary residence of Guru Gobind Singh Ji was Anandpur Sahib in Punjab, India.
Additionally, the location where the first Guru Granth Sahib was compiled is not Kesgarh Saheb. The compilation of the Guru Granth Sahib, the religious scripture of Sikhism, took place at Damdama Sahib under the guidance of Guru Arjan Dev Ji, the fifth Sikh Guru.
Lastly, Kesgarh Saheb is not where the Anand Karaj ceremony was first established in Sikhism. The Anand Karaj ceremony, the Sikh wedding ceremony, was introduced by Guru Ram Das Ji, the fourth Sikh Guru, at the holy city of Amritsar in Punjab, India.