Happy Holi to all of you!
Here's an easy one.
X's father was beheaded at the behest of the king because he was asking for better governance. X received his higher education under Katyayan in Takshashila, and went on to become a great amoral political theorist and kingmaker, dethroning the royal who killed his father and replacing him with a person of his choice. Identify X.
Happy quizzing, and have a nice life, folks!
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Sorry for answering this so late. 17 answers, and all correct! It is indeed Chanakya aka Vishnugupta aka Kautilya!