The correct answer is option 1, Rajya Sabha. The Vice-President of India also serves as the ex-officio Chairman of the Rajya Sabha, which is the upper house of the Indian Parliament. As the Chairman, the Vice-President presides over the sessions of the Rajya Sabha, maintains order, and ensures that the proceedings are conducted in a fair and impartial manner. The Vice-President has the power to cast a deciding vote in case of a tie, but usually, does not participate in the voting process unless there is a need to break a deadlock. It is important to note that the Vice-President`s role as the Chairman of the Rajya Sabha is primarily ceremonial and does not involve any executive or legislative powers.