Explanation:

• The Speaker  appoints the chairman of all the parliamentary committees of the Lok Sabha and supervises their functioning. He  himself is the chairman of the Business Advisory Committee, the Rules Committee and the General Purpose Committee. Hence, the answer is (b)

• Public Accounts Committee: The function of the committee is to examine the annual audit reports of the comptroller and auditor general of India (CAG), which are laid before the Parliament by the president. The CAG submits three audit reports to the president, namely, audit report on appropriation accounts, 
                                                                                                                              
audit report on finance accounts and audit report on public undertakings. At present, it consists of 22 members (15 from the Lok Sabha and 7 from the Rajya Sabha). The members are elected by the Parliament every year from amongst its members according to the principle of proportional representation by means of the single transferable vote. Conventionally, chairman of the committee is selected from the opposition and appointed by the Speaker.

• Business Advisory Committee: It regulates the programme and time table of the House. It allocates time for the transaction of legislative and other business brought before the House by the government. The Lok Sabha committee consists of 15 members including the Speaker as its chairman. In the Rajya Sabha, it has 11 members including the Chairman as its ex-oficio chairman.

• Ethics Committee: It was constituted in Rajya Sabha in 1997 and in Lok Sabha in 2000. It enforces the code of conduct of members of Parliament. It examines the cases of misconduct and recommends appropriate action. Thus, it is engaged in maintaining discipline and decorum in Parliament.

• Rules Committee: It considers the matters of procedure and conduct of business in the House and recommends necessary amendments, or additions to the Rules of the House. The Lok Sabha committee consists of 15 members including the Speaker as its ex-officio chairman. In Rajya Sabha, it consists of 16 members including the Chairman as its ex-of icio chairman.

• General Purposes Committee It considers and advises on matters concerning affairs of the House, which do not fall within the jurisdiction of any other parliamentary committee. In each House, the committee consists of the presiding officer (Speaker/Chairman) as its ex-of icio chairman, Deputy Speaker (Deputy Chairman in the case of Rajya Sabha), members of panel of chairpersons (panel of vice-chairpersons in the case of Rajya Sabha), chairpersons of all the departmental standing committees of the House, leaders of recognised parties and groups in the House and such other members as nominated by the presiding officer