Identify the most famous court-historian during Akbar's reign:

Abu'l Fazl

The correct answer is Option (3) → Abu'l Fazl

Abu'l Fazl was the most famous court historian during Akbar's reign. He authored the Akbarnama, a detailed chronicle of Akbar’s reign, and the Ain-i-Akbari, which provides valuable information on the administration, culture, and society of the Mughal Empire.