Explanation:

1 and 2 are correct

Eligibility and Tenure of Chairman & Members
The President of India appoints the Chairman and other members of the Union Public Service Commission (UPSC). Generally, the members of the commission are the civil servants with at least 10 years of experience either in Central or State service.

The Commission is examined by a Secretariat led by a Secretary with two Additional Secretaries, a number of Joint Secretaries, Deputy Secretaries and other assistant staff.

Each member holds office for a term of 6 years or until he attains the age of 65 years.

Criteria for Removal of Members (Union Public Service Commission)
The members can submit their resignation to the President of India at any time. Any member of the commission would be removed from the office by the President of India on the ground of misbehaviour (if and only if an inquiry of such misbehaviour is made and defended by the Supreme Court of India) or if any member is charged with bankrupt or engaged in any paid employment outside the duties of his office or if the President opines the member is unfit to continue in office by reason of illness of mind or body.

The member can be removed from the office by the President of India on the grounds as well as procedure is given in Article 317 in the Constitution of India.

The Union Public Services Commission is among one of the few institutions which execute both autonomy and freedom along with the country’s higher judiciary and Election Commission.