Statement 1 is correct: The Committee on Estimates consists solely of members from the Lok Sabha, whereas the Committees on Public Accounts and Public Undertakings include members from both Lok Sabha and Rajya Sabha. Statement 2 is correct: The Ministry of Parliamentary Affairs acts as a link between the government and Parliament and functions under the guidance of the Cabinet Committee on Parliamentary Affairs. Statement 3 is incorrect: The power to nominate members to parliamentary committees primarily rests with the Speaker of Lok Sabha and the Chairman of Rajya Sabha. While the government may set up various commissions or boards, the Minister of Parliamentary Affairs does not have a general mandate to nominate MPs to all such bodies.