Explanation:

Public Accounts Committee:
This committee was setup first in 1921 under the provisions of the Government of India Act of 1919 and has since been in existence. 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. Thus, all parties get due representation in it. The term of office of the members is one year. A minister cannot be elected as a member of the committee. The chairman of the committee is appointed by the Speaker from amongst its members. Until 1966–67, the chairman of the committee belonged to the ruling party. However, since 1967 a convention has developed whereby the chairman of the committee is selected invariably from the Opposition.