Who is the author of Allahabad Pillar Inscription?

The Allahabad Pillar inscription is associated with which one of the following?

The Prayaga Prashasti (Allahabad Pillar Inscription) was composed by:

Who is the composer of Allahabad Prasasti?

An inscription by which of the following is found on the pillar containing Prayag Prasasti of Samudragupta?

Who was the author of 'Brihatsamhita'?