Step 1: Understanding 'Iqbalnama-e-Jahangiri'.
'Iqbalnama-e-Jahangiri' is a historical text that is the autobiography of Emperor Jahangir, the Mughal ruler. However, it was written by his close confidant and court historian, Abul Fazl. The text provides valuable insights into the life and reign of Jahangir.
Step 2: Analyzing the options.
(A) Gulbadan Begum: Incorrect. Gulbadan Begum was the sister of Emperor Humayun, and she wrote her memoirs, but she was not the author of 'Iqbalnama-e-Jahangiri.'
(B) Abul Fazl: Correct. Abul Fazl was the court historian of Emperor Akbar and later Jahangir. He wrote 'Iqbalnama-e-Jahangiri' on behalf of Jahangir.
(C) Motamid Khan: Incorrect. Motamid Khan was a notable figure in the Mughal court, but he did not write the 'Iqbalnama-e-Jahangiri.'
(D) Jahangir: Incorrect. While Jahangir is the subject of the autobiography, it was written by his historian, Abul Fazl, not Jahangir himself.
Step 3: Conclusion.
The author of 'Iqbalnama-e-Jahangiri' is Abul Fazl. Thus, the correct answer is (B).