The correct answer is Harisena. 

• Samudra Gupta court poet and minister Harisena composed the Allahabad pillar Inscription or Prayag Prasasti.
• The Pillar was an Asokan Pillar erected by Asoka six centuries before him.
• This Inscription is a eulogy of Samudra Gupta and mentions the conquests of Samudra Gupta and the boundaries of the Gupta Empire.
• As per this inscription, Samudra Gupta defeated 9 kings in the North, 12 Kings in the South, reduced all the Atavika states to vassalage.
• Allahabad Prasasti, composed by Harishena, does not bear any date and for this reason, historians have presumed that it was composed probably before the Ashwamedha Yajna performed by Samudragupta.

Banbhatta

• He was the court poet of Harsha Vardhan. (who reigned c. 606–647 CE).
• He wrote the famous Harshcharit.
• He also wrote Kadambari, Chandi Shatak, and Parvati Parinay.

Vasumitra

• The Fourth Buddhist council was held around 72 AD at Kundalavana, Kashmir under the patronage of King Kanishka(Kushan dynasty)
•  It was presided by Vasumitra who was deputed by Asvagosha
•  The result of this council was that Buddhism was divided into two sects Hinayana and Mahayana.

Kamban

• Kamban was a famous poet of the reign of Kulothunga III.
• He composed the "Tamil Ramayan" or "Ramavataram"