The correct answer is option 'D' - The Ain-i Akbari.

Explanation:

The Ain-i Akbari is a detailed and comprehensive document written by Abul Fazl, a courtier and historian in the court of Mughal emperor Akbar the Great. It is the third volume of the Akbarnama, the official chronicle of Akbar's reign.

The Ain-i Akbari provides a detailed account of Akbar's administration, society, economy, and culture during his reign. It is divided into five books, each focusing on a different aspect of the empire. Let's explore each book and its contents:

1. The first book: It provides detailed information about the organization of the empire, including the administrative structure, revenue system, and military organization. It also describes the various provinces, their governors, and their revenue sources.

2. The second book: This book deals with the household and court of Akbar, including the nobility, the imperial army, the royal kitchen, and the imperial harem. It provides insights into the daily life and rituals observed in the Mughal court.

3. The third book: It focuses on the social and cultural aspects of the empire, including the caste system, the position of women, the arts and sciences, and the religious policies of Akbar. It provides information about the different religious communities and their practices under Akbar's policy of religious tolerance.

4. The fourth book: This book is dedicated to the geography and natural resources of the empire. It includes descriptions of the various provinces, their geography, climate, flora, and fauna. It also provides information about the rivers, lakes, and forests of the empire.

5. The fifth book: It contains a detailed record of the imperial household, including the number of horses, elephants, and camels, as well as the number of servants and soldiers. It also includes a record of the salaries and grants given to the nobles and officials of the empire.

The Ain-i Akbari is a valuable historical document that provides rich insights into the administration and society of the Mughal Empire during Akbar's reign. It is an important source for historians studying the Mughal period and helps us understand the achievements and policies of Akbar the Great.