During the early medieval period in Indian history, official charters recording royal land endowments (brahmadeya) granted to learned Brahmins were most commonly incised on which of the following media?

The correct option is Copper plates.

During the early medieval period in Indian history (c. 600–1200 CE), official charters recording royal land endowments (known as brahmadeya) granted to learned Brahmins were most commonly incised on copper plates (termed tāmra-patra or tāmra-śāsana).

Key features of these historical charters include:
1. Legal Title Deeds: Copper plates served as durable, legally binding deeds of ownership. They recorded exact details of the donor king, recipient Brahmin(s), boundaries of the land granted, immunities, and tax exemptions.
2. Royal Seals: Multiple engraved copper plates were usually bound together using a copper ring held by a cast bronze/copper seal bearing the royal emblem of the ruling dynasty (e.g., Pallavas, Cholas, Guptas, Chalukyas) to verify authenticity and prevent fraud.
3. Distinction from Other Media: Stone pillars were generally used for public proclamations and temple records, while palm-leaf manuscripts were utilized for literary works and administrative records that were less permanent. Copper plates provided a private, indestructible title document handed directly to the grant recipient.