The Vice-President of India holds multiple roles and responsibilities. The correct answer, option 2, states that the Vice-President is the Ex-officio Chairman of the Rajya Sabha. In India, the Rajya Sabha is the upper house of the Parliament and the Vice-President serves as its Chairman. As the Chairman of the Rajya Sabha, the Vice-President presides over its sessions, maintains decorum, and ensures that parliamentary procedures are followed.
Option 1, Speaker of Lok Sabha, is incorrect. The Lok Sabha is the lower house of the Parliament, and its Speaker is a separate position held by a Member of Parliament.
Options 3, Head of the State, and 4, Head of the Government, are also incorrect. In India, the President is the Head of State, and the Prime Minister is the Head of Government.
Therefore, the Vice-President of India is primarily the Ex-officio Chairman of the Rajya Sabha.