Correct option is B
Under Gupta dynasty the rulers wrote their achievements in prashasti.
· The Gupta kingdom was enlarged enormously by Chandragupta Ⅰ's son and successor Samudragupta. The Allahabad Pillar Inscription (Prayaga– Prashasti) gives a detailed account of his achievements.
· Harisena the poet in Samudraguta's Court inscribed the achievements of the ruler in this inscription.