To answer this question, we need to understand the different names by which Chanakya was known.
Option A) Kautilya - This option is correct because Chanakya is also known as Kautilya. Kautilya was the name he used as an author when he wrote the famous treatise on statecraft, economics, and political philosophy called "Arthashastra."
Option B) Vishnugupta - This option is correct because Chanakya is also known as Vishnugupta. Vishnugupta was his given birth name.
Option C) Both - This option is correct because Chanakya is known by both the names Kautilya and Vishnugupta.
Option D) None of the above - This option is incorrect because both options A and B are correct.
The correct answer is Option C) Both. This option is correct because Chanakya is also known as Kautilya and Vishnugupta.