The correct option is A Indica
Indica was authored by Megasthenese who was the ambassador of Seleucus Nikator in Chandragupta Maurya's court. It depicts administration in Mauryan Empire, 7-caste system, and absence of slavery in India. Although it is lost in its original form, it has survived in the form of quotations in the text of classical Greek writers such as Plutarch, Strabo, and Arrian.