The correct answer is option 4, Chief Justice of High Court. When the Governor of a state takes office, they must take an oath of office. This oath is typically administered by the Chief Justice of the High Court. The Chief Justice of the High Court is responsible for upholding the constitution and ensuring the fair administration of justice in the state. They are often considered the highest judicial authority in the state. It is important for the Chief Justice of the High Court to administer the oath to the Governor to symbolize the separation of powers and the independence of the judiciary from the executive branch of the government.