How many part of The Ain-i-Akbari of Abul Fazl ?

The correct answer is Option (4) → Three

The Ain-i-Akbari, completed by Abu’l Fazl in 1598, forms the third volume of the Akbar Nama and is itself arranged in three parts: the first on the imperial household and court, the second on the army, the nobility and the administration, and the third on the provinces with their revenue statistics together with an account of the religious and literary traditions of India.

Note: the work is also described as being made up of five daftars or books, which the standard published edition groups into these three parts.