Explanation:

It is a continuing chamber, that is, it is a permanent body and not subject to dissolution. Only because all of its members do not retire at once, it is a permanent chamber. Hence, R does not explain A, even if it is correct. However, one-third of its members retire every second year. In the first batch, it was decided by lottery as to who should retire. Further, the act also authorised the President to make provisions to govern the order of retirement of the members of the Rajya Sabha. The seats left are filled up by fresh elections and presidential nominations at the beginning of every third year. The retiring members are eligible for re-election and re-nomination any number of times. The Constitution has not fixed the term of office of members of the Rajya Sabha and left it to the Parliament. Accordingly, the Parliament in the Representation of the People Act (1951) provided that the term of office of a member of the Rajya Sabha shall be six years