Option 1 states that the members of the Parliamentary Committees are only appointed. However, this is incorrect because the members can also be elected or nominated.

Option 2 states that the members of the Parliamentary Committees are only elected. This is also incorrect because the members can be appointed or nominated as well.

Option 3 states that the members of the Parliamentary Committees are only nominated. This is also incorrect because the members can be appointed or elected.

Option 4 is the correct answer. It states that the members of the Parliamentary Committees can be appointed, elected, or nominated. The method of appointment, election, or nomination is decided through a motion made and adopted by the Speaker of the Lok Sabha or the Chairman of the Rajya Sabha.

In summary, option 4 accurately reflects the process of appointing, electing, or nominating members of the Parliamentary Committees, while the other options provide incorrect information.