Correct option is B
With respect to Prashastis and land grants both statements I and II are correct.
Prashastis were composed by learned Brahmanas, and kings often rewarded Brahmanas by grants of land which were recorded on copper plates.
Prashastis were a type of inscription that contained glowing praises of the actions of the kings or rulers. They were usually composed by the learned Brahmanas of the time. The Brahmanas were gifted land grants as tokens of appreciation.
The land grants were recorded on copper plates, which were given to the people who received land. The copper plates were a way of documenting the land grants and ensuring that they were not forgotten or lost.
The prashastis and land grants are important sources of information about the history of India.