Prince Salim hatched a conspiracy to kill which well-known figure in Mughal Era?

Abu'l Fazl

The correct answer is Option (1) → Abu'l Fazl

Abu'l Fazl was a close advisor to Emperor Akbar, and he held a prominent position in Akbar's court. He was also one of the "Navratnas" (nine gems) in Akbar's court, known for his intellectual and administrative capabilities. Abu'l Fazl was the author of the Akbarnama, a historical account of Akbar's reign.

The Akbar Nama is divided into three books of which the first two are chronicles. The third book is the Ain-i-Akbari. The first volume contains the history of mankind from Adam to one celestial cycle of Akbar's life (30 years). The second volume closes in the forty-sixth regnal year (1601) of Akbar. The very next year Abu'l Fazl fell victim to a conspiracy hatched by Prince Salim and was murdered by his accomplice Bir Singh Bundela.