Final answer:
52 princes were freed along with Guru Hargobind Ji from the Fort of Gwalior. This event is celebrated in Sikhism through Bandi Chhor Divas. Guru Tegh Bahadur, also a Sikh Guru, was executed by Aurangzeb.
Step-by-step explanation:
The number of princes who were freed along with Guru Hargobind Ji from the Fort of Gwalior is 52. This historical event is significant within the Sikh religion.
Guru Hargobind Ji, the sixth Sikh Guru, was imprisoned by the Mughal emperor Jahangir and later released. It is said that upon his release, he also managed to secure the freedom of 52 Hindu princes who were his fellow prisoners.
This act of the Guru is celebrated in Sikh history and is remembered through the festival of Bandi Chhor Divas, which coincides with the festival of Diwali.
In regards to part 4 of the referenced information, Guru Tegh Bahadur, who was executed by the Mughal emperor Aurangzeb, was a leader of the Sikh religion—not the Muslim religion.