In Shivaji`s Council of Ministers, the Prime Minister was called the Peshwa. The Peshwa was the highest-ranking official and held significant power and authority within the council. They were responsible for advising the king and overseeing the administration of the kingdom.
Option 2, Sachiv, refers to the Secretary or Scribe in Shivaji`s council, who was responsible for maintaining records and handling correspondence.
Option 3, Mantri, refers to the Minister in Shivaji`s council, who held a position of authority and assisted in decision making.
Option 4, Samanta, refers to the Feudal Lord in Shivaji`s kingdom, who held land and had certain responsibilities and duties towards the king.
Hence, the correct answer is Option 1, Peshwa, as the Prime Minister in Shivaji`s Council of Ministers was referred to as the Peshwa.