The correct options are
B They are eulogistic inscriptions issued by rulers.
D They are usually in the form of poetry.
The Sanskrit word 'Prashasti' means 'in praise of'. Prashastis were eulogistic inscriptions issued by rulers. They were usually in the form of poetry or ornate prose written by court poets.
The poet of the Allahabad Prashasti describes Samudragupta as a warrior, as a king who won victories in battle, who was learned and the best of poets. He is also described as equal to the gods.