Guru Ram Das ji - Akal Ustit
The bani "Akal Ustit" was written by Guru Gobind Singh Ji, not Guru Ram Das Ji. The other matches are correct:
Guru Nanak Dev ji
Bhai Mardana was a devoted Muslim companion and follower of Guru Nanak Dev Ji, the founder of Sikhism. He accompanied Guru Nanak on his travels (Udasis) and played the rabab, singing the Guru's hymns.
112
A total of 112 shalokas (hymns) of Sheikh Farid have been included in the Adi Granth.
Ganesh Srikrishna Khaparde
Ganesh Srikrishna Khaparde was an Indian lawyer, scholar, and political activist closely associated with Bal Gangadhar Tilak and the Indian Home Rule Movement. He was not involved with the Gadar Party.
Persian
The word "Doab" is derived from Persian, where "Do" means "two" and "Ab" means "water" or "river." It refers to the land between two rivers.