Who among the following had written 'Nirukta' - the oldest Indian Treatise on Etymology, Philology and Semantics?

Which one of the following is written in both prose and poetry?

Which among the following play was written by Harshavardhan?

Who among the following has described the medieval Indian postal system as of two kinds—the horse-post called ‘Uluq’ and the foot-post called ‘Dawa’?

Which one of the following is the language of the famous political treatise Amuktamalyada?

Who among the following had translated Chintamani Bhatt’s Sanskrit text ‘Suka Saptati’ in Persian and gave it the title ‘Tutinama’?