Option d is the correct answer. The division of Mauryan society into seven classes is particularly mentioned in "the Indica" of Megasthenes. Megasthenes, a Greek ambassador to the Mauryan court during the reign of Chandragupta Maurya, wrote about various aspects of Indian society, including its social structure, customs, and traditions. In his work "Indica," he described the Indian caste system, which he divided into seven classes or groups. This work provides valuable insights into the society and culture of ancient India during the Mauryan period. Important Tips Megasthenes, in his work "Indica," described the Indian caste system and divided it into seven classes: Philosophers: These were scholars and religious teachers who pursued intellectual and spiritual pursuits. Farmers: The agricultural class responsible for cultivating the land and producing crops. Herdsmen: People engaged in animal husbandry and managing livestock. Artisans: Skilled craftsmen and artisans who produced various goods and crafts. Soldiers: The military class responsible for defending the kingdom and maintaining order. Overseers: Administrative officials who supervised various aspects of governance. Councillors: Advisors and counselors to the king, involved in decision-making and governance.